On the first day of school I do an information sheet to get to know my students. Then over the first and second nights of school I make up classroom grids for each of my classes. Each student gets a grid with one block of information for each student in the class, but there is no name.
Every student has to find all the people on their grid. The rules: you can't ask questions like "which block are you?" or copy off someone else's sheet. You can ask, "hey, do you have a dog and ride your bike to school?" The teacher should play along as well (unless you've memorized the answer sheet, which you shouldn't do because that's cheating).
Name tags are a nice thing to use on these days, since it's only the third day students have seen each other that year. Then there's none of that awkward, "who are you?" while students are filling out their sheets.
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