With writing on a PDF (in the browser), Axsuro prints a PDF, such as slides or a curriculum, with room to write. You annotate by hand, photograph the sheets and get the original back with your notes as comments where you wrote them. Markers like todo: work there too.
If you are learning yourself, for a course or a new language, study mode (Plus and up, in the browser) makes flashcards from your own notes, reviewed after 1, 3, 7, 16 and 35 days. The cards belong to your account. Axsuro has no feature for handing decks out to a class. Students and pupils who learn with Axsuro themselves get 30 % off Plus and Pro, see Study notes.