Recall that there are four different base ten blocks: cubes (ones), rods (tens), flats (hundreds), and blocks (thousands). Groups of ten base ten blocks can be regrouped or traded for equivalent amounts of other base ten blocks; for instance, ten cubes can be traded for one rod because both are worth ten. For subtraction, it is useful to know how to trade down rods, flats, and blocks. Trading down means converting larger place value blocks into smaller place value blocks. For instance, one flat can be traded for ten rods since they are both worth 100.

Before describing the subtraction procedure, let’s go over some vocabulary . . .

Minuend – The amount from which you are subtracting.

Subtrahend – The amount that you are subtracting.

Difference – The answer.

In the equation, 234 – 187 = 47, the minuend is 234, the subtrahend is 187, and the difference is 47. Most people don’t bother with the terms minuend and subtrahend, but they are useful in describing the subtraction procedure using base ten blocks.

To begin, represent the minuend with base ten blocks. Try to keep the blocks in order from largest to smallest as this will help to transfer knowledge and skills to paper and pencil methods later on. Remove from the minuend piles, enough blocks to represent the subtrahend. If there aren’t enough blocks available, trade some of the larger place value blocks until there are enough smaller place value blocks to remove. The resulting piles after the subtrahend is removed represents the difference.

In the example, begin by representing 234 with 2 flats, 3 rods, and 4 cubes. The goal is to remove 187 or 1 flat, 8 rods, and 7 cubes from these piles. Removing one flat is simple enough, but 8 rods and 7 cubes are difficult to remove if there are only 3 rods and 4 cubes! To solve this problem, trade in one flat for 10 rods, and one rod for 10 cubes. The result would be 1 flat, 12 rods, and 14 cubes. Removing the subtrahend – 1 flat, 8 rods, and 7 cubes – at this point would leave no flats, 4 rods, and 7 cubes. The difference is whatever is left after removing the subtrahend, so the difference is 47.

For beginners, it would be wise to start with subtraction that does not require trading. For example 1954 – 1831 would require no trading because there are enough blocks in the minuend to remove the subtrahend. For more advanced students, questions that include zeros can present a bit of a challenge. For example, 4000 – 3657 would require several trading steps all starting with four blocks. http://www.math-drills.com has several thousand free math worksheets including subtraction questions with no regrouping (trading). One of the nice features of this website is that answer keys are provided, so students can get feedback on their results.

With enough experience, students learn subtraction on a conceptual level and are better equipped to apply it to pencil and paper methods later on. Students who only learn the paper and pencil method don’t always develop a conceptual understanding of subtraction and are less able to identify errors in their work.

Base ten blocks are not limited to just addition and subtraction of whole numbers. In part III of this series, several other uses of base ten blocks will be explored.

The numbering system that children learn and the one most of us are familiar with is the base ten system. This essentially means that you can only use ten unique digits (0 to 9) in each place of a base ten number. For instance, in the number 345, there is a hundreds place, a tens place and a ones place. The only possible digits that could go in each place are the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, or 9. In this example, the place value of the ones place is 5.

Base ten blocks turn the base ten concept into something children can see and touch.

Base ten blocks consist of cubes, rods, flats, and blocks. Cubes represent the ones place and look exactly like their name suggests – a small cube usually one centimeter by one centimeter by one centimeter. Rods represent the tens place and look like ten cubes placed in a row and fused together. Flats, as you might have guessed, represent hundreds, and blocks represent thousands. A flat looks like one hundred cubes place in a 10 x 10 square and attached together. A block looks like ten flats piled one on top of the other and bonded together.

In order to use base ten blocks to add numbers, students should be familiar with how to represent numbers using base ten blocks. To see what base ten blocks look like, and to try them out, go to the National Library of Virtual Manipulatives:

http://nlvm.usu.edu/en/nav/frames_asid_154_g_1_t_1.html

To represent a number using base ten blocks, make piles of base ten blocks to represent each place value. If your number was 2,784, you would make a pile of 2 blocks, a pile of 7 flats, a pile of 8 rods, and a pile of 4 cubes. It is useful to arrange the piles in a row in the same order that they appear in the number as that will be useful later on when children learn the paper and pencil algorithm.

Another useful skill to practice is trading base ten blocks. Each block can be traded for 10 flats, each flat for 10 rods, and each rod for 10 cubes. Going the other way, 10 cubes can be traded for one rod, 10 rods for one flat, and 10 flats for one block.

One simple use of base ten blocks that translates well to a paper and pencil method of addition is to add by regrouping. To add two or more numbers, start by representing each number with base ten blocks. Put all of the cubes from both numbers in the same pile; do this with the rods, flats, and blocks as well. Next, trade any groups of 10 cubes for a rod. Trade any groups of 10 rods for a flat; then trade any groups of 10 flats for a block. To read the resulting number, count the number of base ten blocks left in each pile and read the number.

To illustrate this procedure, picture the addition question, 568 + 693. After representing both numbers with base ten blocks and combining the piles of like base ten blocks, you should have a pile of 11 cubes, a pile of 15 rods, and a pile of 11 flats. Trading 10 of the cubes for 1 rod means you now have 1 cube, 16 rods and 11 flats. Trading 10 of the rods for one flat results in 1 cube, 6 rods, and 12 flats. Trading 10 of the flats for one block gives you your final piles of 1 cube, 6 rods, 2 flats, and 1 block. The answer to the addition question, therefore, is 1,261.

If you don’t have base ten blocks, you can use the virtual base ten blocks or make paper versions. If you need addition questions (with the answers included), you can access thousands of free math worksheets at http://www.math-drills.com

In future articles, I will describe more uses for base ten blocks including subtraction and multiplication, and I will continue the series with other manipulatives that can help your child or student learn math.

The education a child can gain from a loving and concerned parent will be much greater than is possible to receive in a public school system. You don’t need a teaching credential or even a college degree, just the desire to give your child a quality education. If there are subjects that you don’t feel comfortable teaching it is possible to hire a tutor for those classes. And on the positive side your home school curriculum can incorporate other things such as your own religious and moral beliefs, something that will not be taught in a public school system. By taking control of a child’s education a parent can shape that child’s value system better than anyone else.

There are two main requirements necessary to achieve a rewarding home schooling experience for both you and your child. Obviously you must have a desire to teach your children, that is number one. If you are doing it out of duty or obligation you may soon find yourself in way over your head and wanting to get out. The second requirement is determination. You must truly want your child to succeed and be willing to put forth the time and effort it takes for your child to reach his or her potential. With these two ingredients your child may be able to realize an education that could not be achieved in a public classroom.

You, more than anyone else, want your child to reach their full potential. This is usually not possible in a crowded classroom environment. A child, to learn at their best, must have one-on-one instruction from someone who truly cares for them. And who better than you can give that to them? Public school teachers are overwhelmed by the sheer number of students they must control every day. With the many different learning styles, discipline problems, regulations that need to be followed and other factors a public school teacher cannot spend the individual time with each child that is necessary to bring out that child’s best. Home schooling can help children to blossom and bring out a child’s full potential like nothing else can.

Do you have doubts about your ability to teach? All you have to do to overcome your fear is to visit a public classroom for a day. Visit a kindergarten class or a first grade class and you will see that much of the time spent is merely controlling the children’s behavioral problems. And the lessons that are taught are usually very simple. In a one-on-one home atmosphere you will be able to progress at your own pace.

With a few home school books and lesson plans you will be able to get started very easily. Remember, you are starting your teaching experience with a very young child. And you will actually be able to learn as you go. With a little preparation it is possible to grow with your child. And the first time you see some of your instruction sink into your child’s brain you will feel satisfied that you are performing a very important task. You will surely be surprised at how effective you can be as your child’s homeschool instructor.

Public school teachers have their curriculum all laid out for them. They must follow programs and use materials that others have already approved for them. They must also move at a predetermined pace so that they can get through their study programs even if it means going forward at the expense of a child understanding what has been taught. You, on the other hand, can come up with your own homeschooling curriculum which can include religious or moral beliefs. You can take a field trip anytime you desire. You can make sure your child fully grasps a specific subject before moving forward. This will allow your child the opportunity to learn as they should be learning and at a pace they can keep up with. In a public system the slower children are often left behind.

There are negatives as well as positives however. The biggest negative to home schooling is your time. Your child will most likely receive a more rewarding education at home, but you will be devoting lots of your time to this cause. This could be a big sacrifice, especially if you are struggling financially and need to work. However, with a real desire you may be able to live without luxuries that will give you the time you need to offer your child the education they deserve. Search the internet for lesson plans, other pros and cons, christian home schooling information, home schooling requirements, home schooling books, eclectic homeschooling and other topics of interest. After researching this subject you may find that teaching your child will be even more rewarding for you than it is for your child. If you would like to develop a special bond with your child homeschooling may be the way.

Why Graduation is an important factor?

With graduation, we get a qualification that opens many doors for us. Graduation also brings us at par with millions of other graduates and gives us the pride of being a graduate. It changes our outlook towards life and suddenly we feel that we are responsible citizens who have to make contributions to society and also take ourselves forward in life to achieve our dreams. Till few centuries ago, when there was no formal education, there were no graduates. people used to act on their own at different ages. With the advent of formal education, the society gives us indicators about the future path.

How graduation helps achieving dreams ?

All of us have a dream. Ask a small child about his dream and you will get answers such as I want to become a big man like dad, or I want to become superman, or I want to become a pilot and such things. A child looks at certain people with awe and wants to emulate them. As he/she grows up, the reality dawns that there are many more fields to show one’s strength. With graduation, a child becomes an adult. He/she has to then work their own plan and make their dream real. If the next step
after graduation goes in the right direction, the future may open immense possibilities of growth. That is how graduation helps achieving dreams. A landmark that tells you that from here onward you are on your own. Go forward and conquer the world. Make your dreams real. Become a proud citizen, and make your country proud with your actions and achievements.

The pros and cons of homeschooling are many, but do the advantages outweigh the disadvantages? With total control over your child’s homeschooling needs you have the flexibility to teach your child values that cannot be taught in a public classroom. On the other hand your time will not be as free as it used to be.

The education a child can gain from a loving and concerned parent will be much greater than is possible to receive in a public school system. You don’t need a teaching credential or even a college degree, just the desire to give your child a quality education. If there are subjects that you don’t feel comfortable teaching it is possible to hire a tutor for those classes. And on the positive side your home school curriculum can incorporate other things such as your own religious and moral beliefs, something that will not be taught in a public school system. By taking control of a child’s education a parent can shape that child’s value system better than anyone else.

There are two main requirements necessary to achieve a rewarding home schooling experience for both you and your child. Obviously you must have a desire to teach your children, that is number one. If you are doing it out of duty or obligation you may soon find yourself in way over your head and wanting to get out. The second requirement is determination. You must truly want your child to succeed and be willing to put forth the time and effort it takes for your child to reach his or her potential. With these two ingredients your child may be able to realize an education that could not be achieved in a public classroom.

You, more than anyone else, want your child to reach their full potential. This is usually not possible in a crowded classroom environment. A child, to learn at their best, must have one-on-one instruction from someone who truly cares for them. And who better than you can give that to them? Public school teachers are overwhelmed by the sheer number of students they must control every day. With the many different learning styles, discipline problems, regulations that need to be followed and other factors a public school teacher cannot spend the individual time with each child that is necessary to bring out that child’s best. Home schooling can help children to blossom and bring out a child’s full potential like nothing else can.

Do you have doubts about your ability to teach? All you have to do to overcome your fear is to visit a public classroom for a day. Visit a kindergarten class or a first grade class and you will see that much of the time spent is merely controlling the children’s behavioral problems. And the lessons that are taught are usually very simple. In a one-on-one home atmosphere you will be able to progress at your own pace.

With a few home school books and lesson plans you will be able to get started very easily. Remember, you are starting your teaching experience with a very young child. And you will actually be able to learn as you go. With a little preparation it is possible to grow with your child. And the first time you see some of your instruction sink into your child’s brain you will feel satisfied that you are performing a very important task. You will surely be surprised at how effective you can be as your child’s homeschool instructor.

Public school teachers have their curriculum all laid out for them. They must follow programs and use materials that others have already approved for them. They must also move at a predetermined pace so that they can get through their study programs even if it means going forward at the expense of a child understanding what has been taught. You, on the other hand, can come up with your own homeschooling curriculum which can include religious or moral beliefs. You can take a field trip anytime you desire. You can make sure your child fully grasps a specific subject before moving forward. This will allow your child the opportunity to learn as they should be learning and at a pace they can keep up with. In a public system the slower children are often left behind.

There are negatives as well as positives however. The biggest negative to home schooling is your time. Your child will most likely receive a more rewarding education at home, but you will be devoting lots of your time to this cause. This could be a big sacrifice, especially if you are struggling financially and need to work. However, with a real desire you may be able to live without luxuries that will give you the time you need to offer your child the education they deserve. Search the internet for lesson plans, other pros and cons, christian home schooling information, home schooling requirements, home schooling books, eclectic homeschooling and other topics of interest. After researching this subject you may find that teaching your child will be even more rewarding for you than it is for your child. If you would like to develop a special bond with your child homeschooling may be the way.

Nature is trying to warn us about the consequences of our mistakes and is sending us signs that the global warming is installing. These early warning signs are: heat waves and unusually warm weather; the ocean has warmed up in the last few years, the sea level has been in a continuous rise and the coasts have been flooded; glaciers are melting and the Arctic and Antarctic are warming up. This is only the beginning as consequences will be seen soon: diseases will spread, the spring will arrive earlier, plant and animal range will shift and population will change; coral reef bleaching; in some parts of the world flooding, downpours and heavy snowfalls will follow and in other parts droughts and fires will dominate.

In order to protect ourselves, our economy, and our planet from the consequences of climate change, we must consider reducing emissions of carbon dioxide and other greenhouse gases. Such a transformation needs the involvement of all humans, over the near and long-term, in order to protect our planet. In the beginning we must understand that small measures like: recycling plastic and glass, saving water and conserving power will make a difference is everybody will adopt them. Until now ‘greener’ ways of producing energy have been considered, like using solar panels, producing gas from rotting rubbish and using the water for new energy.

Taking care of the nature does not need so much effort from us, but things…(read the full article at the link below)

Why go for home schooling?

Many parents also believe that home schooling can provide their children a custom and complete education, which many believe is inaccessible in private or public schools. Home schooling is known to be the traditional method of teaching. Some parents also feel that along with education on various subjects, religious education is equally necessary. Most times it is not available in public schools. It may be available in private schools, but they may be too expensive for the family to afford, or faith taught in schools may be different from their family religion.

Know your child’s learning style:

The parents should see to it that their children are not debarred from any of the education available in schools. Try to study your child and observe his or her interests. Some children show signs from a very early age. They may be into outdoor games, like to play with colors or music. Some may like mechanical stuff like counting and building blocks, modeling clay, putting lego together, or they may like to read, or listen to recordings of storybooks. This way you will know how to deal with them, teach them, and mould their interests. Children learn in different ways; by touching and handling things, by listening, and by visual methods like reading. They tend to be very inquisitive and love to learn new things.

You can get DVD’s and instructional videos about life, science, geography etc. This way they will be exposed to a wide concept about everything around them. National Geographic has come up with lovely series which are very informative. You can get these DVD’s from stores, and they are easily available these days. Interesting and stimulating videos will help the children develop their mental faculties and will entertain them at the same time.

Teaching at home is much less expensive, as for a private school you will end up paying up to amounts of $3500 or more. But never try to skimp on this expense. Try and set aside a specified amount for home school supplies so that you would not have to compromise on their quality of education. This way you can buy those encyclopedia Britannica DVD’s or painting brushes you need, without affecting your family budget.

Homeschooling has its own benefits. Your children would always be under your watch. Also you would know about their progress, so if they are lagging behind in some subjects, you would be able to help them. Sometimes you may have to face volumes of questions from other parents which may not be very encouraging, but that should not discourage you from what you are doing, because you would know what’s best for your children. Never forget that it is the outcome that is important so always focus your educational goals.

“How much did it cost to fix your car?”

“Six hundred bucks!”

Without any words such as: about, approximately, around, roughly, or nearly, it can be assumed that the second person rounded the actual cost. Before they had their car fixed, they probably received an estimated cost of the repair from the shop. Adults experience rounding and estimation skills in their daily lives. Children need to learn these important skills partly because they often hear estimation and use estimation, but more importantly, it helps to solidify math learning by teaching them the idea of reasonableness.

Even though rounding and estimating are related, there is a significant difference. Rounding involves converting a known number into a number that is easier to use. Estimation is an educated guess of what a number should be without knowing the actual number. In the conversation above, it is unlikely that the second person remembered the actual price of the bill; they likely rounded the number at the time, so they could better remember it.

Children usually learn rounding as an explicit skill, often with the purpose of estimating the answers to math questions. They commonly use estimation to check the reasonableness of an answer by either estimating ahead of time or after they have completed the question. Students run into difficulty when estimating because they don’t have the intuitive sense that adults do to break the rules.

For the uninitiated, the idea of rounding is fairly simple – decide where to round the number (e.g. the hundreds place), either keep the digit at the rounding place the same or round it up, and replace the digits to the right with zeros. The decision to keep the digit the same or to round it up is based on everything that comes after the digit. If it is less than half, the digit remains the same; if it is greater than half, the digit is increased by one; if it is exactly half, the digit remains the same if it is even and increases by one if it is odd. For example, to round 638 to the nearest hundred, you would base your decision on the “38″ portion of the number. Since it is less than half (50), the digit in the hundreds place remains the same, and the 38 is changed to zeros, so the rounded number is 600. If the question is to round 7500 to the nearest thousand, you would round up to 8000. 8500 also rounds to 8000, but 8501 rounds to 9000. Hopefully, this illustrates that rounding follows a strict set of rules that often cause difficulties for children in estimation.

To give you an idea of how following the rounding rules can be problematic in estimation, consider the question 7359 divided by 82. The first difficulty is deciding what place to round to. Let’s say that the student decides to round to the nearest hundred in the first number and the nearest ten in the second number, thus the question is now 7400 divided by 80. At this point some students might resort to a calculator, others to long division, and others might stare confusedly at their paper. An adult with more intuitive sense might look at the numbers and recognize that if she rounded 7359 to 7200, it would be fairly simple to divide by 80 (because 72 divided by 8 is easy).

Many people develop an ability to estimate both by following the rules and by breaking the rules of rounding. Many children need to be taught these skills, so there is a genuine purpose to their estimation rather than just another question to answer. Estimation should be thought of as a tool to quickly determine whether an answer is reasonable or not. One way of teaching estimation for this purpose is by allowing students to break the rounding rules and find an easy question that they can do in their head. In the question 3564 – 2801, rounding to the nearest hundred results in 3600 – 2800, but 3700 – 2700 is much easier to handle, and it is not so far off the real answer. If the purpose of estimating was to get as close to the real answer as possible, you might as well use a calculator to check your answer instead.

Parents can help develop students’ estimation skills by regularly asking real questions. For instance, ask them how long they think it will take to get to hockey practice (time), have them add up the cost of the groceries as you are shopping (money), get them to count the number of people in one area of the mall and have them estimate how many people are in the whole mall (multiplication or addition). Educators should make estimation a regular part of the problem solving process. In a science investigation, students make hypotheses and predictions, so why not make an estimate in a math problem? Students can develop their estimation skills by answering questions on worksheets and comparing their estimated answers to the actual answers. http://www.math-drills.com has thousands of worksheets with answer keys that you could use for this purpose.

Remember these rules for estimation: (i) KISS – keep it simple silly, (ii) break the rounding rules if necessary, (iii) ensure students see a purpose for estimation, (iv) give students a lot of practice and experience with estimation and rounding, (v) include estimation in problem solving and other daily math work. The main rule for parents and teachers: support your students and be flexible!

Pros
Future Needs: The use of computers and an understanding of how to use the Internet are already critical to modern society today in manifest directions. These include, the work environment, information gathering for work orpleasure, shopping, communications etc. and if true today, how much moretomorrow. The Office of Occupational Statistics and Employment predicts thatthe computer industry will continue to show the greatest growth of any industry in the USA. According to the Bureau of Labor Statistics (BLS), more than half of all workers used a computer on the job in September 2001. And nearly three-fourths of those workers connected to the Internet or used e-mail.

Early Skills Acquisition: As with all fundamental skills, the earlier the education system allows students to become familiar with technology the greater will be their depth of understanding and effectiveness in using it. It is immaterial to argue that skills acquired today by a five year old will not be relevant later in life because technology will develop beyond comprehension. This is because skills acquired can focus on an understanding of what computers can do rather than just how to interact with today’s computers. In addition, once the initial ground work has been obtained the potential for adaptation to a dynamic system can be incrementally updated in the same way as adults have to adapt to new technology.

Personalization: Computer based content allows a level of individual engagement and interactivity that comparative learning systems fail to deliver. By its nature learning with the computer is a one-on-one experience or at worst, small groups. This alleviates the paradigm of large classes with minimal personal intervention.

Learning Levels: Computers allow users to individualize their speed of attainment to suite their personal needs and capabilities. The speedy are not held back and those that need greater repetition are not passed over. Additionally special groupings can be more easily and effectively catered for.

Wide Distribution of Quality Teaching: Computer based learning allows the maximum effectiveness and distribution of the best quality teaching and content. A great teacher is not limited by the classroom but can reach out across the Internet to thousands either through building digital lessons or distance learning software and programs. Most distance learning systems today can be configured as live broadcasts with high levels of interactivity with the teacher. Now, here are the equally strong arguments against.

Con’s
Accessibility and Suitability: If an individual does not have access to a computer or does not understand the content through a language deficiency or cultural differences, they will be relegated to the digitally divided, 44 million at the last count just in the USA according to Professor Howard Besser, The Next Digital Divides.

Interfering with Natural Development: Young children should be utilizingtheir natural propensity for physically based activity rather than be ‘stuck’ infront of a computer. They already spend damaging amounts of time glued to televisions, as researchers have discovered, that impairs development. Our children, the Surgeon General warns, are the most sedentary generation ever.

Lack of Depth: Computer based content is a long way from offering the depth, flexibility and tried and tested results that a trained, dedicated and experienced teacher can offer children. In addition, the interaction with a sophisticated adult allows critical advanced vocabulary and personalization skills.

Quality of Content: Most digital content is overly simplistic in its structure. For example, a sum can only be wrong or right. The content will not explain to the student why the sum was wrong. A real teacher will mark a piece of work and offer the essential logic reasoning for the decision that will enable the student to gain a fundamental understanding of the system behind what constitutes correct/incorrect.

Health Hazards: Computers pose health hazards to children. The risks include repetitive stress injuries, eyestrain, obesity, social isolation, and, forsome, long-term physical, emotional, or intellectual developmental damage.

Safety: Children must be protected from the dangers of the Internet, stalkers, adult content, hate and violence. Filtering software is notoriously inefficient.

By no means am I attempting to articulate all the arguments or cover them inreal depth but just to raise some of the issues we all face. In my opinion both the Pros and Cons are very strong arguments all of which need serious consideration and answers.

Now to put this in to an importance perspective, digital technology is invading virtually every aspect of modern society and its impact is becoming fundamental to how we work, play and learn. Technology within education also has a huge role to play but its’ effectiveness and impact has not been studied in the depth and breadth that such a fundamental development requires.

In the work environment, mistakes in the use of technology are paid for inmonetary terms. How much less can we afford to make mistakes with introducing technology to our children, mistakes made here cost far more than damaged business, with education we are talking damaged lives. At the moment we just seem to be ‘throwing’ computers and the Internet at teachers and children, as I state above, without any real understanding of what we are actually doing to the children or should I call them ‘guinea pigs’.

The logic seems to be, at least on the governmental level, that we cannot afford for the coming generation not to be computer enabled, as this ability will be critical for a country to be economically competitive. In fact every country is being driven to ensure it’s digital competitiveness. At a governmental level this logic is difficult to fault but it is our job as educators and parents to ensure thatthe effectiveness of the headlong plunge is in the best interests of all the children.

My opinion is that large-scale research in to the issues needs to be carried out. Not on the scale of a few dozen subjects over weeks as many examples of current research do, but thousands or even tens of thousands of subjects over years.

These subjects need to be from 2 years to 8 years old. They need to bewidely dispersed geographically. Come from all levels of the social andattainment spectrum. In fact technology and the Internet is a perfect platform to carry out this type of research. I founded the Internet based Kindersite Project to enable researchers to accomplish this type of wide-scale program.

I believe that only significant research that studies thousands of subjectchildren over a long-term, years probably, will allow the educational community to really gain full and meaningful answers to the questions such as:

Does the early introduction of digital content positively or negatively affectyoung children?
What should be the parameters of the introduction (if any)?
What content types should be employed within the introductory process?
What constitutes ‘good’ or ‘bad’ content and why?
What parameters define ‘good’ or ‘bad’ content?
As a result of sustained and profound research, guidelines should be drawn. These guidelines should offer teachers and parents tried and tested parameters for the use of computers for their children at each age level. It should include areas such as; how long should a child use a computer over a period, maximum and minimum attainment levels to be expected for each age group based on set proficiency standards, how digital content should be integrated in to standard lesson plans in a similar way that other media isused.

Most importantly, set standards for educational content providers must be laid down that they must adhere to if they wish to produce educational content utilizable by educationalists.

In addition all young childrens’ content, educational or leisure should be labeled with its appropriateness for each age group. These standards should be defined by the research.

In conclusion, it is fairly obvious that computer based educational content is becoming a feature of schools, whether we like it or not. In the home we see increasing evidence that even the smallest children are gaining access to computers either with parents or through watching older siblings. It is unreasonable to expect to turn back the clock and bar children below a certain age from computers, this is unenforceable and ineffective.

It is our duty to ensure that clear usage standards are set, content guidelines are drawn and sites rated at a governmental level so that children, parents, caregivers and educators have a clear and safe basis for using computers and the Internet with their charges. Anything less is an abrogation of all our responsibility.

Organic Chemistry

Organic Chemistry has to do with the study of compounds that contain carbon (and sometimes hydrogen). Even though carbon is only the fourteenth most common element on the planet, it produces the greatest number of different compounds on Earth. Not surprisingly then, much of the study of chemistry involves organic chemistry.

The most studied groups of organic compounds are those that contain nitrogen. These organic compounds are important because they are often linked to the amino group. When the amino group combines with the carboxyl group, amino acids are born. Amino acids are important because they are as the building blocks of proteins.

Inorganic Chemistry

Inorganic chemistry involves the study the properties and reactions of compounds that do not contain carbon and which are not organic. Inorganic chemistry studies all non-living matter, such as minerals found in the Earth’s crust. There are many branches of inorganic chemistry, including geochemistry, nuclear science, coordination chemistry, and bioinorganic chemistry.

There is much overlap between organic and inorganic chemistry. For instance, organometallic chemistry studies the use of compounds that are capable of creating a covalent bond between carbon and metal.

Physical Chemistry

As its name implies, physical chemistry has to do with the physical properties of materials. Physical properties that are studied may include the electrical and magnetic behavior of materials, as well as their interaction with electromagnetic fields.

There are several subcategories of physical chemistry. These include thermochemistry, electrochemistry, and chemical kinetics. Thermochemistry studies the changes of entropy and energy that naturally occur during chemical reactions. Electrochemistry is concerned with the study of interconversions of electric and chemical energy of matter, as well as the effects of electricity on chemical changes. Chemical kinetics involves the study of chemical reactions. Specifically, chemical kinetics studies the equilibrium it reached between products and their reactants.

Biochemistry

Biochemistry is a branch of chemistry concerned with the composition and changes of living matter. Biochemists commonly focus on the physical properties and structures of biological molecules. Common biological molecules include carbohydrates, proteins, lipids, and nucleic acids. Biochemistry is sometimes referred to as physiological chemistry and biological chemistry. Biophysics, molecular biology, and cell biology are research fields closely related to biochemistry.

Analytical Chemistry

Unlike the other main types of chemistry, analytical chemistry doesn’t deal specifically with specific elements. Analytical chemistry is concerned mainly with the various techniques and laboratory methods used to determine the composition of materials. Qualitative and quantitative analysis are the two most basic methods used in analytical chemistry. Qualitative analysis has to do with identifying all the atoms and molecules in a sample of matter, with attention paid to trace elements. Quantitative analysis also involves determining the atomical and molecular structure of matter, but includes also measuring the exact weight of each chemical constituent.