The researchers have found that existing VAMs tend to underestimate the amount of test score improvement that actually occurs at some schools. (sciencedaily.com)
• Read more: California called out as «a laggard in student achievement» as test score improvement stalls (laschoolreport.com)
And, the tests must produce results that allow comparisons with other schools and can be used for Arizona's A — F school grading system (the Arizona Department of Education gives charter and district schools a letter grade based on student test scores, test score improvement from year to year, and other indicators). (heritage.org)