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Much of the information used in this video comes from www.cem.org/attachments/ebe/ESguide.pdf. This video explains what effect size means when reading educational research and was designed for use by RSE-TASC members in New York. The .3 mentioned was our bottom limit for deciding if a practice was effective. John Hattie (Visible Learning) states that .4 is a better floor and we have changed our...