Learning goals: Teacher Facing Comprehend the term “opposite” (in spoken and written language) refers to numbers with the same magnitude but different signs. Create and interpret equations and diagrams that represent adding signed numbers in the context of elevation. Generalize (orally) a method for determining the sum of two signed numbers. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from 7.5 Rational Number Arithmetic, Grade 7.