Learning goals: Teacher Facing Determine unknown values in a relationship that is not proportional, and explain (orally and in writing) the solution method. Interpret and describe (orally and in writing) relationships that are predictable, but not proportional. Justify (orally) that a given relationship is not proportional. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from 7.6 Expressions, Equations, and Inequalities, Grade 7.