I'm using kaplan flashcards for bio right now and they are actually really helpful. I'm struggling to read through cliffs and stuff so i'll take a break with the flashcards which is rapid pace. And they ask you questions so its kind of like a practice bio section. Its a really good supplement to reading cliffs. I'm making my own flashcards for orgo based on chad's and i'm not too sure about gen chem... I mean I could use them for some stuff but to me practicing applying the equations and math would be more beneficial.
Best of luck!