I agree, having learned something with flashcards is like you have a repertoire to choose from. Instead of having to sort everything A1, A2, A3, B1, B2, B3, C1, C2, C3 you get to sort A, B, C. It has built in chunking. And what I noticed is that with memorizing comes understanding. Your flashcard says A on the front and A1, A2, A3 on the back. After reading it a few times you will understand what A means. But it will also help you put together the overall topic of A, B, C. It is wonderful compression.