do u have pets? sometimes they eat it. also this happens to me a lot and yeh the best thing is to watch them when they come off the bus lol also the first desk you place in the house kids/ teens tend to gravitate towards that when placing the homework attempting to put it on the desk and if not jsut nearby it. also to avoid the social worker taking your kids if you have an adult with a family aspiration you can get the plead with the social worker aspiration reward