At my (public school so no ridiculous school fees):
In my cohort quite a few accelerated in subjects, here are some raw scores
Mate 1: 50 in Further and 46 in Spesh (HE NOW TUTORS IN YEAR 12)
Mate 2: 48 in Further and 48 in Psyc
Me: 48 in Methods and 49 in Physics
None of us did tutoring!There are others with 45+ scores but not sure if they do tutor or not, but the long and the short of it is your personal drive

IF YOU ARE DETERMINED AND DRIVEN ENOUGH YOU WILL SUCCEED.
What are tutors doing that you couldn't do yourself?
Give you more questions ~ | you could do more textbook qs, practise exams or by checkpoints, A+ guides OR THE AN GUIDES  |
| yes, for this you will need to spend money but look around on the net/school library/public library. |
| Ultimately though, it will be cheaper than getting tutoring every week for every subject |
Explain questions you don't get ~ | ask your teacher in class or at lunch or stay back after school |
Teach ahead~ | teach yourself.. personally i can finish a textbook in a few hours |
Sit next to you and watch you work ~ | get a cat if you really want this |
Take your money~ | donate it to charity if you really don't want it |
A tutor cannot give you the drive you need to succeed. They can try, but ultimately it comes from within yourselfAlso the skittles and cup-noodles Brenden mentions sound pretty tempting

EDIT: If you don't believe me, and you might have a reason not to (?)

, look at private schools can compare them with public/selective schools. Why do MHS and McRob always pwn private schools? Coz the students have something no amount of money thrown into education can give, personal determination and motivation

Good luck shadows and anyone else reading this!