Math Mammoth
Math Mammoth: More Problem Solving With Bar Models, Part 2
Demonstrates how to solve two word problems using bar models, similar to those used in the Singapore Math program. [3:42]
Math Mammoth
Math Mammoth: Area of Rectangles and Rectangular Shapes
Demonstrates how to find the area of a rectangle using unit squares. [9:53] CCSS.Math.Content.3.MD.C.7.a Find the area of a rectangle with whole-number side lengths by tiling it. CCSS.Math.Content.3.MD.C.7.d Recognize area as additive.