For those who choose the portfolio option, the evaluator is a certified teacher who will perform the evaluation. If, in the evaluator's opinion, the child has made "adequate academic progress," then you're OK. According to statute, Superintendent can refuse, but this rerely happens. If it does, you select another, and another, until the Superintendent approves. In practice, it's more trouble than it's worth to refuse you.
An individual involved in all stages of the evaluation process, from defining the terms of reference and collecting and analyzing data to making recommendations and taking corrective action or making improvements.
a person who assembles data and information collected about a teacher, analyzes them, makes judgments as to whether that teacher's performance level meets the pre-specified standards, prepares a summary report, writes recommendations, and may provide feedback to the teacher, directly or through another person. In general, one evaluator determines the overall merit, value, and/or worth of the evaluee. See Assessor, Evaluand, Evaluee.