http://www.ixl.com/math/grade-5/nets-of-3-dimensional-figures
http://illuminations.nctm.org/Activity.aspx?id=3544
http://www.learner.org/interactives/geometry/3d_pyramids.html
http://www.learner.org/interactives/geometry/3d_prisms.html
http://www.harcourtschool.com/activity/solid_figures/
http://www.ixl.com/math/grade-5/three-dimensional-figures-viewed-from-different-perspectives
http://pbskids.org/cyberchase/math-games/point-out-view/
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