• As a part of the Mountain Brook Schools student assessment program, the Naglieri Nonverbal Ability Test - second edition (NNAT3) is given to all 2nd and 4th grade students. The NNAT3 is a nonverbal measure of general ability that yields a norm-based score that can be used to identify students who are likely to have the potential for advanced scholastic achievement. This assessment is used as a screener for our Gifted program.