Student or Learner
Which one is correct?
Write your questions in the handout or on the handout.
Wite your notes in the page of your textbook or on the page of your textbook.
Write your annotation in the margine or on the margne of your textbook.
Write your summary on your notebook or in your notebook.
I'd use on for both, though in for the first sounds OK. (BrE speaker)