Khan Academy Static

Topic B includes lessons 5-8. "Form rectangles by tiling with unit squares to make arrays. Draw rows and columns to determine the area of a rectangle given an incomplete array. Interpret area models to form rectangular arrays. Find the area of a rectangle through multiplication of the side lengths." EngageNY

8680_Measuring_area_with_partial_unit_squares.html

8683_Finding_missing_side_when_given_area.html

8681_Counting_unit_squares_to_find_area_formula.html

8682_Transitioning_from_unit_squares_to_area_formula.html