Test Your Knowledge- I Did

Lyndsey's Mania has a terrific web site with original free online education games:

Crack the Code
Make a Match
Sliders
Find It
Dot to Dot
Buy it (Money Game)
Canadian Geography
Test Your Geography Knowledge USA
Test Your Geography Knowledge European
Test Your Geography Knowledge African
Test Your Geography Knowledge The World (Oceans and Continents)
How Far is It?
Math Practice

They are easy to use, provides instant feedback and is a must have item in your review arsenal. Plus- they're FREE!