51 Esti-Mysteries - Steve Wyborney's Blog: I'm on a Learning Mission.

51 Brand New Esti-Mysteries!  4 Challenge Levels!  All New Images! Esti-mysteries are math puzzles based in number estimation! Students are challenged to guess the correct number while being provided clues over a period of time. Esti-mysteries are accessible through hyperlinked powerpoints. Great fun and excellent for teaching math concepts!
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