I apologize, but I did have to take some files off this site because of possible Copyrighted material within them.  Bummer!
But fortunately, Obe Hostetter gave me a bunch more to post.

Website: www.allenteachers.com

RCPS is now coordinating with www.allenteachers.com to help develop more web based TEI questions.  Check out what they've already created.

Math: Tutorials for Creating TEI Items

Science: TEI Practice Items

English/Reading TEI Resources

There are also some reading tests I created on my Assessments page.  They are not interactive TEI questions, but do have the look and feel of the VA SOL Reading Test.