There seem to be manipulatives for every area of math, why not trigonometry? If you have a high school student working on trig, then you know they have to be able to use manipulative devices along with a calculator to achieve mastery of the subject. The 8 ½" by 11," heavy, styrene TrigTrainer helps fulfill this requirement by allowing students to better understand sine, cosine, and tangent functions.
The 80 page activity book found in the introductory kit includes 24 activities and a bit of trig history. It works with the basic functions of trig and is packed with useful resources that enhance the teaching power of the TrigTrainer. A projectable TrigTrainer is also included in the kit for use with groups or simply for demonstration purposes with your own student.