Nameless papers drive me crzay! Easy and adorable. No Name board. Clip papers that don't have names on them to the board and have students go check there instead of spending your time trying to figure out who they belong to!
Number magnets to keep track of kids you allow to leave the room. Use a cookie sheet with glass stones glued to scrapbook paper and a magnet. then trim in fun duct tape! (The cookie sheet magnet board is pretty sweet for multiple different crafts.
Another good grouping idea! Use the bracelets for assigning students into teams for class projects. Or if you want random team assignment, put the bracelets in a paper bag and have students close their eyes and pick one.
Grouping students tool for the classroom - each child chooses a kiss. Use kisses and garage sale dot stickers! As a homeschooling parent, I don't have many needs to "grouping kids" but this is such a great idea I've got to remember it for co-op next year!