Super Maths World
Click guest and then any of the sample games (green tick beside game). Sample games are available in all the categories.
Play at your chosen difficulty level – games available for Algebra, Data, Number and Shape
Several excellent games from Manga High.
Jonathan Hall’s Flash Maths includes a games collection.
John-Paul Green’s FlashyMaths has several excellent resources.
Math is fun – numerous games on their games pages.
Games2 includes a Parking lot game – similar to Rush Hour.
This page also has Tangrams.
Count On games collection
I Love Maths Games (E Hughes)
Math Games from Jefferson Lab (Thomas Jefferson National Accelerator Facility – Office of Science Education).