You have three kids all at the same school and each of them came home last week with a flyer asking for donations of copy paper and ink for the printer. It's like telemarketers asking you to pay their phone bill.
While you probably can't stop the onslaught of letters, flyers, menus, schedules, trip slips and rosters, you can manage it with the helpful School.files expanding file from Buttoned Up.
With compartments for up to three children you can sort out the stuff you need to keep, the stuff you need to return, and the stuff you need to just toss in the recycling bin. Have more than three children? Buy multiples!