A Minnesota Department of Education report shows these three common restraints. So-called prone restraints are known to restrict breathing and can be lethal to children. About half of states don’t have a law prohibiting public schools from using such restraints. Minnesota is enacting regulations to limit prone restraints. Related: Violent and Legal: The Shocking Ways School Kids are Being Pinned Down, Isolated Against Their Will

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Correction Jun. 19, 2014 5:27 p.m: This illustration previously stated that Minnesota does not allow prone restraints on disabled children and that the state will ban the tactics in August 2015. In fact, Minnesota allows the use of prone restraints in an emergency, on disabled children aged five or older. Minnesota is currently enacting regulations to limit prone restraints, and it is uncertain changes in prone restraint regulations will occur by August 2015.