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This document includes the Teacher's Guide for Learning Experience 4: Force, Weight, Mass.This wiki version can be edited or built up with other materials on the same topic by members of the Curriki community. The entire Nature’s Forces Simple Machines collection is also available as downloadable PDFs.
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This resource received a 3* rating because it is part of Natures Forces Simple Machines Science Kit, which received a rating of 3-Exemplary in the Curriki Review System and which you can see here: http://www.curriki.org/xwiki/bin/view/Coll_cabocesmst/NaturesForcesSimpleMachinesScienceKit