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Standardized Testing: A Case Study

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Project STAR began in the fall of 1985 with the random pairing of over 6,000 kindergarten students and 325 teachers being assigned to one of the three types of required classes. The SAT and BSF standardized tests were given in the spring of 1986. The results showed that the performance of the kindergarten students that attended the small type class (13 to 17 students) showed benefit of about one-fourth of a standard deviation for reading and math scores over the students who attended the regular class (22 to 26) with a teacher, or a regular class (22 to 26) with a teacher and a full time teacher aide. A student with a gain of one-fourth of a standard deviation would move from the 50th percentile to the 60th percentile, thus surpassing

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