Khan Academy Static

Topic C includes lessons 11-14 and covers volume with fractional edge lengths and unit cubes, from unit cubes to the formulas for volume, the formulas for volume, and volume in the real world.

9160_Volume_with_fractional_cubes.html

9159_Volume_of_a_rectangular_prism_fractional_dimensions.html

9161_Volume_of_a_rectangular_prism_word_problem.html