For years Quizlet has enabled users to study for quizzes/tests by being able to review using flashcards. I know when I taught 4th grade my students loved being able to review the important vocab terms for a quiz or test. Over the years Quizlet has evolved into having matching games, learning games, etc.
Now Quizlet has Quizlet Plus that uses AI to create flashcards/an outline, sample essay questions, and an AI tutor all from your notes, slides, docs. It is created in less than a minute.
Speaking from experience with my daughter who is in 9th grade - this has been such an amazing tool for her. She can upload her notes from Google Docs and instantly have her review terms ready to go.
Quizlet Plus also has the ability to help students with an essay starter, a summary of notes as well as the ability to get expert solutions.
Embedded below is a 2 minute and 9 second YouTube tutorial.