This Instructional Activity is a part of the Lesson 1, Unit 4, Grade 8. The purpose of this activity is for students to solve number puzzles using any representation they choose. Students then make sense of other representations for the same problems, starting with those of a partner. The whole-class discussion should focus on the strengths and weaknesses of different representations. For example, tape diagrams only work for problems with all positive values, so you could use one for the distance puzzle, but a tape diagram would not work for the temperature puzzle. Identify students using different strategies, such as number line diagrams, tape diagrams, written out reasoning, and equations, to share during the whole-class discussion.