Learning goals: Teacher Facing Explain (orally and in writing) the meaning of each term in a quadratic expression that represents the height of a free-falling object. Use tables, graphs, and equations to represent the height of a free-falling object. Write quadratic functions to represent the height of an object falling due to gravity. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from Alg1.6 Introduction to Quadratic Functions, Algebra 1.