Hi - my daughter had ACL surgery one week before she was beginning High School. Our doctor and PT guy were very concerned about the other kids in the school knocking her over and accidentally hurting her.
We talked to the principal and my daughter was released from her classes about 5 minutes before the end to get to her next class before the hallways filled. In addition she was allowed to use some of the staircases that were off limits to the other students. Also, sometimes if the teacher is covering something important to the end of class just wait and be late for the next class. All the teachers were so understanding.
Her doctor also wanted her leg elevated for a while so we bought a folding step stool which was kept at school. At the end of the day she would leave it in her first hour teacher's room.
Our school policy is no medicine at the school and they will not administer it so parents are to come in and sign a log every time they come in to disperse meds. Lucky for me the principal decided to break the rule for her so I didn't have to drive to the school every day.
Have her choose a friend she can rely on to help her carry her books. It's much easier to have an assigned helper instead of asking someone every day.
I think the other thing is attitude. We were pretty bummed at first - freshman year and she couldn't do volleyball or marching band. She ended up being the manager for the VB team (did stats and tracked the data on the computer) It was a wonderful way for her to learn the game better and the data work was a good life skill. It also showed her good attitude to her coach. As for band, her director changed her from marching flute to the bells/xylephone which is a stationary instrument placed in the front of the band. It was tons of fun for her to learn a new instrument. So it seemed she was exposed to more things and was limited to her "normal" activities. It gave her lots of confidence.
My daughter's advice to you is to be ready for a wacked out groggy kid. She said she really appreciated all our help because she couldn't do anything for herself. I agree, if you get some meals done in advance and frozen, or just order in. You will be as tired and emotionally drained as her.
My daughter is now starting her junior year and has had no issues with her knee since the surgery and recovery. Good luck to you and your daughter!