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LOC Mystery Photo Contest – A Good Test of Search Strategies
At about this time last year the Library of Congress hosted a mystery photo contest. They’re hosting another one right now. Just like last year’s
At about this time last year the Library of Congress hosted a mystery photo contest. They’re hosting another one right now. Just like last year’s
Last spring I wrote about Mathigon’s Map Coloring Challenge. That’s not the only map-based math lesson available from Mathigon. Mathigon’s lesson on spheres, cones, and
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