Learning how to deal with “bad” teachers, whether it is because they are boring, hard, difficult to understand or otherwise is part of school life. It occurs even at top boarding schools. Sometimes there is nothing that the student can do about it but suffer through the class and do the best they can, even if that means a less than perfect report card.
It may be years later that she discovers that she is better prepared for future science or physics classes than students who were in the “better” or “easier” sections. It could also turn out that she has to change her plans or take different courses later in her academic career. Stuff happens.Generally, it all works out in the end.
Right now, she should work within the teacher’s system, as best she is able, seek supplemental help, either from other teachers, peers, tutors, or even Khan Academy, and talk to her advisor. With it being a long time faculty member, there is probably not much else she can do.