Barney Math

This is a great step-by-step booklet to help derive all the values on the unit circle. Instead of just teaching students to memorize the values, you can show them where they all come from and teach them to derive the unit circle themselves if needed. Print the PDF as a booklet and it can be glued into a interactive notebook with other foldables.

This is a fun "poof" book with steps for finding rational roots of a polynomial. It uses synthetic division to check roots (rather than the remainder theorem). I don't have my own instructions for folding it, but you can Google "how to fold a poof book" and you will find instructions. This is a great resource for Algebra 2 and Pre-calculus.

This is a nice foldable showing the 6 trig functions. It uses SOH CAH TOA for kids to remember Sin, Cos, and Tan. Cut the corners from the top so there are no flaps on the top, then cut each of the 6 flaps to reveal the details of each function. When printing, select "ACTUAL SIZE" NOT "FIT" so lines will line up.