Khan Academy
Khan Academy: Compose Shapes
Practice combining shapes to make other shapes. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
CK-12 Foundation
Ck 12: Elem Math: Count Rectangles, Square,s and Triangles in Composite Figures
[Free Registration/Login may be required to access all resource tools.] The video defines a composite shape and shows how to determine the total number of triangles in the given shape. The video is followed by practice problems to assess...
PBS
Pbs: Count on It!: Blossom and Snappy Go Camping
Blossom and Snappy help Robbie prepare for her camping trip. They learn about dehydrated food and the amount of water she will need for the four days and four nights she will be away. They also learn how to pick the right spot at the...