When studying shapes this is a great way to have students practice identifying and deciphering between shapes independently. This sheet also reinforces the attributes of the given shape by having the shape appear when all of the correct shape have been colored in.
This is also a great, simple shape review worksheet.
These pages work great as morning work in kindergarten.
CCSS.Math.Content.K.G.A.2 Correctly name shapes regardless of their orientations or overall size.