These are very useful to me as an itinerant teacher! They are easy to have on hand for students when they need support in math and can be used over and over again! Having the ability to create custom lines on the opposite side is also very useful!

My son has Autism and this has been the only way he can learn addition and subtraction. I'm very thankful for them.

This product is excellent! Students love to practice counting numbers using their number lines.

These number lines are pretty sturdy and wipe off easily. They have been great for estimating, adding and subtracting. My only wish is that they didn't come in sets with three types of number lines. While I use the 1-20 one, and the 10's one, I will rarely use the counting by 100's. However, having a few is a way to extend my more advanced kiddo's learning.