Improving Student Achievement: What NAEP State Test Scores Tell Us -RAND The RAND study, led by David Grissmer, is based on National Assessment of Educational Progress (NAEP) tests given in 1990, 1992, 1994 and 1996 to representative samples of 2, 500 students from the 44 voluntarily participating states. www.rand.org/publications/MR/MR924/reviews
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