Large number line from -20 to 100 designed to reinforce basic math concepts.

https://pacon.com/miscellaneous-548/demonstration-number-line-20-to-100.html

Stephanie Lapine from our Math Learning Center: I like this specific item because it demonstrates negative numbers as well as positive numbers and it is a good size. Many students struggle with adding and subtracting negative numbers. Placing this set above the whiteboard in the room provides a visual aid for practicing adding and subtracting negative numbers.