How to increase SAT scores? Expensive tutorials or home study?

i have taken alot of exams so this i know that spending too much on tutors is not gonna help. if your girls are intelligent enough to get great scores(which they seem to be) you should make them do alot of practice tests once they are good with the theoratical part. make sure they understand what is being asked and they have not crammed everything. practice practice practice. this is the mantra for all exams they will be taking in their lives. oh and also u need to find out what is their individual weakness and work on it.