After returning to school from a long weekend earlier this year, TimJarboe went to check on the nurse's office at his Athens, Georgia,middle school. The principal gasped when he saw the medicine cart withits lock snapped off and drawers pried open. "Oh, no," Jarboe thought."Not again."

For the second time since September, the medication bottles of 16students were missing from Coile Middle School. This meant thathundreds of doses of Ritalin and Adderall, two stimulants ...