Weather or Not http://www.phschool.com/atschool/california/mathematics/pre-algebra/Student_Area/PREALG_SC1_ACT2_index.html
Interactive Math http://matti.usu.edu/nlvm/nav/vlibrary.html
Design Packaging for Cereal http://www.phschool.com/atschool/california/mathematics/pre-algebra/Student_Area/PREALG_SC10_ACT2_index.html
The Locker Problem: http://mathforum.org/alejandre/frisbie/locker.problem.html
AAA Math: http://www.aaaknow.com/grade7.html