A Level physics teacher here:
Read the relevant textbook section and answer the summary questions after every lesson. Get ahold of the Pearson revision workbook for her spec. Answer the relevant section after every lesson.
Then go back to the beginning of her work from the year - create summaries of the notes. Go online to the old specs past papers. Answer as many questions as possible (the questions will be quite similar for most topics...
Homework: she should do her corrections after it's handed back.
It will get easier if she puts more effort in, I promise!! Not to say she isn't putting in effort, but my most successful students have lived, breathed the work, looking for new ways to do the same thing.
I was even sent a summary from one student of three different approaches to a specific type of ratio problem (they start at A2)...
Oh and she can try creating her own revision guide!! Use the spec, textbook, notes, etc.