When I googled TASP, what I found was the "Texas Academic Skills Program." It is described here:
http://www.testprepreview.com/tasp_test_breakdown.htm
It looks like the name has changed to THEA.
Of course, the post where you saw this could have been referring to something else. I saw a six week program that also has this abbreviation. There probably are other things as well, but I figured I had done enough research!