Interactive Math http://matti.usu.edu/nlvm/nav/vlibrary.html
Living on Your Own http://www.thirteen.org/edonline/lessons/lifecost/c.html
Choose Your First Job http://www.phschool.com/atschool/california/mathematics/algebra1/Student_Area/ALG1_SC7_ACT2_index.html
The Locker Problem: http://mathforum.org/alejandre/frisbie/locker.problem.html
AAA Math: http://www.aaaknow.com/grade8.html