This brief examines the use of student test scores in teacher evaluations in CA. It argues that current evaluation methods are not effective, and that alternative methods of measuring teacher effectiveness, such as peer evaluations and student surveys, should be explored. The brief also discusses the potential consequences of over-reliance on test scores, such as teaching to the test and neglecting non-tested subjects. It concludes that teacher evaluations should be designed to provide useful feedback for professional development, rather than being used solely for accountability purposes.