Factor Trees
http://nlvm.usu.edu/en/nav/frames_asid_202_g_2_t_1.html

Mastermind
http://nlvm.usu.edu/en/nav/frames_asid_179_g_2_t_1.html?open=instructions

Complete the Pattern
http://nlvm.usu.edu/en/nav/frames_asid_185_g_2_t_1.html

The Sieve of Eratosthenes
http://nlvm.usu.edu/en/nav/frames_asid_158_g_2_t_1.html?open=instructions

Games
http://www.coolmath-games.com/

Graphing Quizzes

http://www.bbc.co.uk/schools/ks3bitesize/maths/handling_data/index.shtml
Circle Graphs
http://illuminations.nctm.org/ActivityDetail.aspx?ID=60

Math Problem Solving Sites
http://www.stfx.ca/special/mathproblems/grade5.html
http://www.stfx.ca/special/mathproblems/grade6.html
http://www.saxonhomeschool.com/activities/enrichment/middle/index.html

http://nrich.maths.org/public/