Learning goals: Teacher Facing Calculate and interpret (orally) the constant of proportionality for a proportional relationship involving fractional quantities. Explain (orally and in writing) how to use a table with only two rows to solve a problem involving a proportional relationship. Write an equation to represent a given proportional relationship with a fractional constant of proportionality. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from 7.4 Proportional Relationships and Percentages, Grade 7.