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|A new estimation challenge every day of the school year, with accompanying video answers. Join the number sense challenge online by submitting your own estimates, explaining your reasoning ("What context clues did you use?") and rating your accuracy ("How confident are you?"). Creator Stadel also offers an occasional newsletter of "new estimation challenges, math tasks, and simple tips to use in your classroom or workflow."|
|Levels:||Middle School (6-8), High School (9-12)|
|Resource Types:||Video, Problems/Puzzles, Newsletters|
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