Learning goals: Teacher Facing Comprehend (orally and in writing) the terms “multiple,” “common multiple,” and “least common multiple.” Explain (orally and in writing) how to calculate the least common multiple of 2 whole numbers. List the multiples of a number and identify common multiples for two numbers in a real-world situation. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from 6.7 Rational Numbers, Grade 6.