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It's crucial to teach your students how to organize their materials. Tips: clean-out every Friday, have a "Desk Fairy" visit clean desks, use a box top as a drawer if needed
Reminder Cards classroom discipline plan (I might place these on students desks when they need a reminder.)
Pick six students every Friday and write them a special note on their desks for them to find Monday morning. Keep a list and start again when everyone in the class has been done.