That's a good idea to hire the tutor after you figure out her weak spots. My daughter has ADHD so there was no way she would have studied on her own, which is why we did the tutoring from the get-go (we are in LA and it was quite pricey). I do know there are some places that offer online classes plus a tutoring package. My nephew did just the online classes and his SAT only went up by 50 points, although I don't know how dedicated he was to doing the homework, etc.
This has happened to my daughter, who is also on ADHD meds. She did fine her first semester, but only managed to pass one class second semester. She had quit taking her ADHD and depression meds, which we didn't know until later. My daughter goes to school on the opposite coast so it was difficult to keep tabs on her.
Anyway, we hired an ADHD/life coach for this semester (after going back and forth as to if we were even going to send her back). She had us make a document with 3 columns: "Abby's opportunities" (e.g., Abby's parents will pay tuition, room and board for four years of undergrad) and then a column with our boundaries (Abby must maintain a Bs or hard-earned Cs with a tutors help in order for her parents to pay for tuition, etc) and then "Abby's choices" (e.g., Abby can choose to maintain Bs or hard-earned Cs or Abby can choose to pay her own tuition). We did this for spending money, cell phone, etc.
Anyway, are you sure your daughter was taking her medications while she was at school?
I also don't think the classes are worth the money. We hired a test prep one-on-one tutor for my daughter and her ACT score went up 6 points. I've used Kaplan in the past (for myself) and was not impressed.