How do I raise my ACT score? sos

I took the ACT in April I believe and here were my scores:
Reading- 29
Math-27
English-34
Science-28
So my composite was a 30. This was significantly lower than I expected. One factor was that my calculator was dead and I tried to solve things myself but then I didn’t have enough time, so my math score is a bit irrelevant. I also took AP Calc as a sophomore and have always excelled in math but now I’m not doing as well on ACT or SAT math. I am taking the June ACT and SAT. I have a SAT prep service but don’t have anything other than released exams to study for the ACT. I would like to get a 34 on the ACT and a 1500 on the SAT(1430 previous score, 715 math and reading), but I have no idea how to study for the SAT. Science seems to be my weakest area. I was also surprised at my Reading score, as that is normally a great area for me. All around, it was a rough test but I definitely think I can improve. Just looking for some tips or sites that I can use to study for the ACT.
Thx!