Number Line for doing Sums.
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I created this number line template for my son when he was learning to do subtraction sums at school.
Available in pdf or jpg versions 
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Number Line Template (jpg)
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It can be helpful to laminate the number line. Then you can use it with white-board markers or liquid chalk markers, and wipe the working off to re-use.
HOW TO USE THE NUMBER LINEA number line can be used to help visualise a sum as you work it out. There are different ways to use the number line, and the way you use it also changes as the student advances, I'm demonstrating below just one of the ways in which you can use a number line.
Lets try this subtraction sum: 66-37 The starting number is 66, so you find that number on the number line. You need to take away 37, which is made of three lots of 10 and seven lots of 1. First you take away the three lots of 10 (see diagram right - you can click on the image to enlarge it) |
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Then you need to take away the seven lots of one (see diagram on right). In this example you have to carry onto the line above as you do this. Then you have arrived at your answer, which in this case is 29.
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