they help increase an average student 's self-esteem 
(ROOT (S (NP (PRP they)) (VP (VBP help) (S (VP (VB increase) (NP (NP (DT an) (JJ average) (NN student) (POS 's)) (NN self) (HYPH -) (NN esteem)))))))
(ROOT (S (NP (PRP )) (VP (VBP ) (S (VP (VB ) (NP (NP (DT ) (JJ ) (NN ) (POS )) (NN ) (HYPH ) (NN )))))))