"Maple T.A. is an easy-to-use web-based system for creating tests and assignments, automatically assessing student responses and performance.
It supports complex, free-form entry of mathematical equations and intelligent evaluation of responses, making it ideal for mathematics, science,
or any course that requires mathematics." -

How to register in MapleTA

Sites of interest

Embedding MapleTA in wikispaces

From the Things I Do blog:

Since you can set MapleTA assignments to be anonymous, MapleTA will merely produced the questions and not record anything in the gradebook. Using the EMBED tool and the code below students can practice at whim:
[IFRAME SRC="http: server/mapleta/modules/test.Test?className= classname&testName= testname//" TITLE="MapleTA" WIDTH='100%' HEIGHT=600][/IFRAME]