The Magic School Bus: Show and Tell Competition
It s the International ShowandTell Competition and Arnold and Dorothy Ann are representing Ms. Frizzle s class. Arnold brings a webbed hoop, left behind by his greataunt Arizona Joan, the famous archaeologist, but he has no idea what it is. Using clues from it and Joan s journal, the class makes educated guesses about its uses. To test their hypotheses, Ms. Frizzle turns the bus into a Supposatron, a magical device designed to evaluate guesses.
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