Wired math from the university of Waterloo provides some excellent opportunities to learn the key ideas in middle school math online. You can help Builder Ted climb his ladder by ordering decimals or go to the Fish Tank and work out the probability of Pythagoras finding fish or go from Rags to Riches as you solve the algebraic problems. What a great learning site, and as I always say 'trick them into learning!'

Cudos to the team at Wired Math, University of Waterloo for bringing great fun to a great topic! You'll want to bookmark this engaging and interactive site.