Introduce a new concept and explain its usefulness. When teaching math, teach one new concept at a time. For example, you might be teaching students how to multiply. So start by introducing the topic of multiplication. Give them examples of how they will use multiplication in their daily lives, even outside of school.

Then break it down into steps. You can start by explaining a broad mathematical principle to the student, but then break it down into the smallest possible steps. This will help the student understand why you are doing it the way you are doing it, and will help them learn and remember how to do it on their own.

Explain why. Often in math, teachers explain how to do something, but not why it is done that way. This may be good for some students, but for most students, it is difficult to understand concepts if they do not understand why it is done that way. Many students who can find the right answer to a math problem have simply memorized the steps, but have not really understood the reasons why a certain concept works the way it does. If they do not understand the theory behind the problem, they are likely to forget it very quickly.

Give a simple example and walk them through it step by step. Once you have introduced the concept and explained the different steps involved in the calculation, give a simple example. Show them how to work it out step by step. If you are teaching a classroom of students, use the chalkboard to write out the problem, then use a different colored chalk (or marker) to show them each step involved in the calculation.

Then give them a more difficult example. If students have no more questions after you have shown them the simple example, move on to a more difficult example problem. Instead of just showing them how to do it, ask them to guide you.