These sites feature valuable teacher and administrator information especially for grades 6 through 8.
Connected Mathematics(grades 6–8)—This site has parent and teacher information, including research, assessment information, FAQs, lesson plans, and other resources.
Connected Mathematics 2(grades 6–8)—Resource center maintained by Pearson for parents, students, and teachers that includes homework help, skills practice, math online games, and vocabulary quizzes
Geometry from the Land of the Incas(grades 6–12)—An eclectic mix of sound, science, and Incan history intended to interest students in Euclidean geometry. Recent additions include Simson Line (proof of Simson line), The Raft of the Medusa (problem solving with fractals and animation), Archimedes and the Rhombicuboctahedron (Archimedes the Geometer), Sierpinski Triangle and Machu Picchu (fractal illustration), Johnson's Theorem (three equal circles pass through a common point), Varignon and Wittenbauer Parallelograms (quadrilateral: midpoints and trisection points of the edges), and Van Aubel's Theorem (quadrilateral with squares).