This Instructional Activity is a part of the Lesson 6, Unit 5, Grade 6. This same context can be worded more simply for English language learners, and students working below grade level would benefit from a quick pantomime of painting a wall. A short video clip might also set the context quickly. The custodians are considering painting our classroom next summer. In order to know how much paint they must buy, the custodians need to know the total surface area of the walls. Why do you think they need to know this, and how can we find the information?