Learning goals: Teacher Facing Calculate and interpret the two unit rates associated with a ratio, i.e., $\frac{a}{b}$ and $\frac{b}{a}$ for the ratio $a:b$. Choose which unit rate to use to solve a given problem and explain the choice (orally and in writing). Comprehend the term “unit rate” (in spoken and written language) refers to a rate per 1. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from 6.3 Unit Rates and Percentages, Grade 6.