Each day, students complete a Warmup that usually consists of spiraling the previous day's material, in addition to older material. Warm-up problems also sometimes extend lessons that students have encountered before to more unfamiliar contexts. I often use a "mixtape" approach that pushes the kids to see/review multiple types of problems - the cumulative effect of which can be really powerful.
This unit moves fairly quickly, and so the warm-up questions are useful times to review and consolidate student understanding.
This homework assignment dives right in with the challenging content from today's lesson: