In this new age of teacher evaluations, how can you measure the effectiveness of a special-education instructor? The majority of special-education teachers believe that standardized testing, a common method for evaluating general-education teachers, would be an ineffective tool to measure their performance. New York, Florida and Illinois are actively researching the best possible way to evaluate special-education teachers, but many are worried that the process is moving too quickly and may negatively impact students with special needs.