3.MD.C.5.a: A square with side length 1 unit, called "a unit square," is said to have "one square unit" of area, and can be used to measure area.

Also written as 3.MD.5.a or 3.MD.5a

A square with side length 1 unit, called "a unit square," is said to have "one square unit" of area, and can be used to measure area.

Khan Academy Resources
Find area by counting unit squaresCompare area with unit squaresUnderstand areaMeasuring rectangles with different unit squaresIntro to area and unit squares
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