Learning goals: Teacher Facing Choose and create a double number line diagram or table to solve problems involving unit conversion. Explain (orally) how to use a “rate per 1” to solve problems involving unit conversion. Recognize that when we measure things in two different units, the pairs of measurements are equivalent ratios. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from 6.3 Unit Rates and Percentages, Grade 6.