Just this month, OSPI released a new kind of data: Student Growth Percentiles (SGP). What are student growth percentiles? In short, SGPs describe a student’s growth in state test scores as compared to other students with similar prior test scores. Here’s a five minute video:
You can find Student Growth Percentiles for your specific school or district here: http://data.k12.wa.us/PublicDWP/Web/WashingtonWeb/PublishedReports/PublishedReports.aspx
or http://bit.ly/1lE2Pi9
What are student growth percentiles for? Teacher evaluation is one potential use, and will be an issue in the upcoming legislative session. Washington state recently received a high risk warning from the federal government regarding teacher evaluation. The issue? Whether state test scores “can” or “must” be used in teacher evaluation—the U.S. Department of Education is saying that state test scores must be used in order for Washington state to continue to receive a NCLB waiver. We’ve written extensively about this waiver on our blog—see posts from Mark, Kristin, Tom, and myself.
One issue with including state test scores in teacher evaluations? Very few teachers in Washington state even teach classes associated with a state test! The number of teachers with state test data has been estimated at 16% at the most by OSPI—see the chart.
How do you evaluate teachers with state tests when these teachers don’t even teach courses that are tested? In Tennessee, teachers without test scores were able to choose a test for their evaluation, leading to some unusual conversations, “The P. E. teacher got information that the writing score was the best to pick,” said the art teacher. “He informed the home ec teacher, who passed it on to me, and I told the career development teacher. It’s a bit like Vegas, and if you pick the wrong academic subject, you lose and get a bad evaluation.” In Florida, teachers have been evaluated using school wide test averages, meaning that some teachers are evaluated based on test scores from students they have never taught. North Carolina attempted to test students of all teachers in all subject areas with 52 different standardized tests. All these approaches have proved problematic.