In conjunction with SERC's Math Conference on Tuesday, September 28th, here are some sites to check out!
Learning Today blog, http://blog.learningtoday.com/ excellent free resources are offered by this software company. Also check out the "Teacher Resource" tab. Lots of K-5 stuff including materials for all levels of learners that will help with differentiation.
Math Snacks, http://www.mathsnacks.org/, designed by educators at New Mexico State University with NSF funds are engaging animations and games designed to help learner in grades 6-8 truly understand math concepts.
Harcourt School Publishers at http://www.hbschool.com/thinkmath/index.html is indexed by grade level for K-5, web-based math activities and concepts including numbers, data analysis, operations, algebra, geometry, time money and measurement.
Math Apprentice, http://www.mathapprentice.com/ provides opportunity for students in grades 4-8 to put math skills to work in one of eight businesses.
Jim Dornberg has created a wiki housed at http://smartmeasurement.wikispaces.com/ . Grades K-6 can view activities about length, time, money, perimeter, area, temperature, weight, volume, surface area, and angles.
Minute Math, http://www.10minutemath.com math.com is a high school teacher sharing knowledge with students and colleagues across the world. There are extra assignments for his calculus class, a set of non-linear graphs with the labels and scale hidden in a Word document for teaching exponential growth, a review Jeopardy game created with a Flash-based online game creator, explore some of the past posts for more.
And last but not least, Math and the Movies!, http://mathbits.com/MathBits/MathMovies/MathMovies.htm uses over 20 movies as teaching tools. Movie options contain information about which clip to show and provides student worksheets. Most activities are developed for grades 6-12 and movies range from a 1941 Abbott and Costello film, Proof, Castaway, Star Wars, Star Trek, to Harry Potter.