tutorial school reacher student ratio 1 to 6 or more, some only care for the money, no intention of improving the kid's grade. don't expect too much. Else, pay for 1 to 1 private tutor, if U student, some under 100 per hr. p1,1 hr is enough, short attention span.
Still you have to help on revision on weekends...must one on one teacher very 'hea'. I have to correct mistakes after they leave...