How many houses can you get to on Halloween? The problem solving activity http://t.co/B73fW4GzAW #mathchat #elemchat #pbl #5thchat #4thchat
— Brian Marks (@Yummymath) October 28, 2013
via Twitter https://twitter.com/Yummymath
October 28, 2013 at 03:31PM
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