Problems with the Use of Student Test Scores to Evaluate Teachers

Valued-Added Measures (VAMs) are the newest craze in economists’ and politicians’ attempts to create a “scientific” way to measure teacher effectiveness. VAM takes a student’s achievement level upon entering a teacher’s class–as measured by standardized tests–and compares it to the student’s achievement level after a year with that teacher. The difference purports to be that

Night Sky News for October

Here’s a tip for fostering spatial thinking in children: Get a compass and show them how to find the directions with it. Remember when you find North, you are actually finding the alignment of the earth’s rotational axis. The circle of the compass, with its notation of degrees, presents a wonderful exploration of measurement using

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