You'll notice that the team must meet at least annually to review, among other things, the results of any evaluative data.

http://www2.ed.gov/parents/needs/speced/iepguide/index.html

States have various regulations on how quickly the team must reconvene to consider the results of independent evaluations, whether obtained at parent expense, or as a district-paid IEE after an evaluation deemed unsatisfactory by the parents. (10 school days is not uncommon.)

...pronounced like the long vowel and first letter of the alphabet...