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Friday is Zachary Zormer's favorite day of the week. At least it is until he realizes he forgot this week's assignment, "Bring in something fun to measure." Tyler, the class show-off, brings a picture of himself from the newspaper. How can Zack top that when all he has to work with is a piece of paper he finds in his pocket? Week after week Zack takes on a different math concept (length, width, area, perimeter) with surprising projects including a mobius strip, a paper frame large enough to step through, and a light show that demonstrates how the sun heats the earth.