Learning goals: Teacher Facing Evaluate (orally) the usefulness of calculating a rate per 1 when solving problems involving unfamiliar rates. Explain (orally, in writing, and through other representations) how to solve a problem involving rates in a less familiar context, e.g., minutes per window. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from 6.3 Unit Rates and Percentages, Grade 6.