Godwin's #STEM students are investigating the properties of an unknown substance. https://t.co/y4BQ5yEd93 http://pic.twitter.com/l18N1CbDXE
— Pine Grove Middle (@PGMVikings) September 15, 2016
from Twitter https://twitter.com/PGMVikings
September 15, 2016 at 02:21PM
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