Answer: paperairplane

AnswerCrossword Clue
PAPERAIRPLANEKid's projectile
PAPERAIRPLANEFolded flier
PAPERAIRPLANEClassroom projectile
PAPERAIRPLANEInexpensive missile
PAPERAIRPLANEFlier from a folder
PAPERAIRPLANEIt might go over some students' heads
PAPERAIRPLANESomething that might be thrown behind a teacher's back