The Math U See Pre-Calculus with Trigonometry Instruction Manual & Tests, authored by Stephen P. Demme and published by Demme Learning, is a comprehensive educational resource specifically designed for high school and elementary school students. The instruction manual is in good condition with very minimal writing in it (pictured). The test manual is new and unused. I will also mail the work book if you would like to have it. It has some pages worked in it and some blank. This is free if you want it.