Based on VAM achievement gain scores only, 32 teachers in 18 districts had highly effective evaluations and 5 districts had elementary teachers who consistently earned unsatisfactory ratings over 4 years. Such small numbers can only mean that VAM scores are worthless.
There are 175,006 teachers in Florida. Could it just possibly be that VAM scores reflect which students are assigned to a teacher rather than which teacher is assigned to a class? It does not take high level critical thinking to answer this question.
The Florida legislature could come up with a better evaluation system. Almost any one of the options would be better if laced with a little common sense.