Learning goals: Teacher Facing Apply dividing by fractions to calculate one edge length of a rectangular prism, given its volume and the other two edge lengths. Explain (orally, in writing, and using other representations) how to solve a problem involving the volume of a rectangular prism with fractional edge lengths. Generalize that it takes more smaller cubes or fewer larger cubes to fill the same volume. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from 6.4 Dividing Fractions, Grade 6.