This document contains a lesson on writing and evaluating expressions involving multiplication and division. It includes examples like calculating the number of apples in bags containing 3 apples each, or the amount of money returned from recycling cans with a $0.05 deposit. For each example, students are asked to write expressions in terms of variables like the number of bags or cans, and evaluate the expressions by substituting values. The lesson emphasizes that when the number of groups like bags or cans is given, multiplication is used, but when the total number in all groups is given, division is needed. An exit ticket assessment is assigned to conclude the lesson.