Answers

2014-12-09T11:33:37+05:30
You  can   appoint  a  student  leader  in  charge  of  this  responsibility.Tell  him  to  report  you  if  a  student  runs  out  of  school  during  school   classes. 
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2014-12-09T11:34:04+05:30
You can keep counting the children. Or you can keep a strict penalty for that children so that they may not dare to do that.
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