The superintendent of the Los Angeles Unified School District says 30 percent of a teacher's evaluation should be based on student test scores.
Ramon Cortines told administrators Wednesday that the district wants a new evaluation system and test scores should be part of it.
Such a plan would need approval from the teachers' union, United Teachers Los Angeles.
Union president A.J. Duffy said Thursday the district needs to examine data before moving forward with such a plan. He says students are not graded on the tests that would be part of a teacher's evaluation and so don't give a full effort.
Duffy also says only math and language arts are reviewed in standardized tests, so only 37 percent of teachers can be evaluated.
Copyright 2010 The Associated Press.