Let's use unit rates like a pro. Learning targets: students can choose how to use unit rates to solve problems. Required Materials: pre-printed slips, cut from copies of the blackline master four-function calculators. Print and cut the blackline master so that each group of two students gets five cards A-E (or six cards A-F if you expect students to tackle the extension problem). If you would like students to practice arithmetic, don't offer calculators.