Learning goals: Teacher Facing Comprehend the word “variable” to refer to a letter standing in for a number and recognize that a coefficient next to a variable indicates multiplication (in spoken and written language). Generate values that make an equation true or false and justify (orally and in writing) whether they are “solutions” to the equation. Use substitution to determine whether a given number makes an equation true. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from 6.6 Expressions and Equations, Grade 6.