The ALGEBRA TILES CLASSROOM SET is a must have for your math manipulatives classroom collection! Students have fun building geometric models of polynomials. This algebra tiles classroom set allws for exploring firsthand concepts related to them. Our classroom set includes enough tiles for 30 students. Each classroom set also includes our Overhead Set (ERLER 7541) and a 40-page book enabling students can be actively involved in teacher-directed lessons. Ages 11 to 17