This activity is designed for whole class use. Students will gather their own data, write their own rate, convert to different units, and compare to rates of other students. This activity, although done as a whole group, allows each student to generate his/her own data to work with, so even though they may be working together, each student's work will be different. This encourages students to practice the skills themselves instead of just copying from the board or a neighbor.
Could be a great introduction or more interactive review of rates and conversions.