A great resource for making number lines.
A great number line is hard to find. Now there is a site where you can custom make number lines to suit your needs for free.
At math-aids.com there are many options to choose from.
1) You can generate blank number lines. Your options include positive or negative numbers, and different ways to break up the number line into whole numbers or fractions.
2) You can create worksheets to add or subtract numbers on a number line.
3)You can create worksheets to locate fractions, mixed numbers, or decimals on a number line. This also includes positive or negative numbers.