The basic logic is as follows: (and can be found, with additional details, in the resource called the "Test Validation Table")

 1) ASISTS looks at the tests from the time period of January 1 through June 30, and takes the test CLOSEST to the June 30th date - one for each test type (TABE Math, TABE Reading, Best Plus, Best Literacy).  That test is put in the pool, any earlier tests are ignored.  The logic here is that if the tests that are earlier were lower, then the later test was used as a post-test for the prior FY to show gain, and therefore the lower AND earlier pre-test cannot be used again.

 2) ASISTS Takes all pre-tests from the current FY (July 1 - June 30) and adds them to the pool.

 3) ASISTS Takes the lowest pre-test from this pool, and this is considered the pre-test of record for the current FY.