Learning goals: Teacher Facing Comprehend the structure of a function as having one and only one output for each allowable input. Describe (orally and in writing) a context using function language, e.g., “the [output] is a function of the [input]” or “the [output] depends on the [input]”. Identify (orally) rules that produce exactly one output for each allowable input and rules that do not. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from 8.5 Functions and Volume, Grade 8.