It would be great if you can use the apple pencil in studying mode to take notes for more complex answers or drawings.
You could also use this feature to learn the structure of scientific models by leaving some information out at the front of the flashcard, fill them in and then compare with the solution after flipping the card. It would also be possible to put tasks like "Draw the xy-model" on the front page and the corrrect model on the back of the flashcard.
To implement this solution a bigger display of the card would be helpful.