Carson Dellosa 30-Piece Number Line Set, 22" x 1.5" Dry Erase Hands-on Learning Tools With Color-Coded Numbers -20 Through 20, Math Classroom Must Haves Misc. Supplies – January 15, 2015

I had these laminated at my school and they are fantastic. My students got a lot of use out of them and it was a great tool for them to have.

They are durable but could likely stand to be laminated. You can write on them with dry erase and it comes off pretty well. I love these manipulatives my high schoolers with disabilities who could quite fathom negative numbers being real, but this makes integers tangible

These are very nice for children learning to add and subtract. I learned with number lines and thought it would be helpful for my granddaughter. I did not read that there were 30 in the pack so maybe take note of that. Great value for the money.

I had mine laminated at school, my students are consistently making mistakes when they should not be. I am hoping these will help.

I bought these for my seventh grade students this year. We spend much of Unit 1 talking about the rules of signed numbers and this helps them visualize how numbers change when you add or subtract negatives and positives.Most useful is that it’s glossy and you can absolutely mark it with expo marker and it erases right off. When ordering numbers, many of my kids wanted to have out their lines.

I just became a math teacher at an adult school. My students really appreciate these. One thing I wish they had was an adhesive on the back side to stick to desks.

-20 to 20 Student Number Lines is a great tool for teaching students about integers. The number lines are clear to read, durable, has bright readable numbers, and can be used over and over. This is a GREAT purchase for teachers and guardians.

Laminate these and they will last forever. My students love them.