Learning goals: Teacher Facing Calculate the surface area of a prism, and explain (in writing) the solution method. Comprehend that surface area and volume are two different attributes of three-dimensional objects and are measured in different units. Interpret different methods for calculating the surface area of a prism, and evaluate (orally and in writing) their usefulness. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from 7.7 Angles, Triangles, and Prisms, Grade 7.