With the help of my mother-in-law's superb sewing skills, I created seat pockets for each student desk in my classroom. I have five rows with five student desks in each row labeled with a number and a letter A1-A5, B1-B5, C1-C5, D1-D5, and E1-E5. I gave each row a different color seat pocket. This is an efficient way to form collaborative groups based on any data you wish (MAP scores, high-low reading levels, personality, etc). All the kids know is that they are in the purple group or is an A or a 4 that day.