Most California schools perform about as well as expected over a three-year period when student characteristics are factored in, concludes a new similar schools measure developed by the California Charter Schools Association. From California Watch:
Using a complex regression analysis, the measure takes a number of characteristics of the school’s student population into account. These include the socioeconomic background of the student body, the average education level of their parents, the number of students with disabilities, the percentage of English language learners, and the racial and ethnic makeup of the students.
Researchers say the measure is more accurate than the state’s “similar schools” ranking, which don’t include small schools and fluctuates from year to year.
Seventy-eight percent of schools performed within 5 percent of their predicted level on state tests, according to the CCSA’s analysis. Nearly 10 were just below and 10 percent just above the prediction. That left only 2 percent of schools far below their level, and 1.6 percent far above.
California charter schools are four times more likely to be among the top 5 percent of schools that exceed their predicted test scores – and twice as likely to be among the bottom 5 percent across the state, said Samantha Olivieri, CCSA’s accountability manager.