My kids use the index cards for flashcards. When I study with them the cards are not easy to flip from one to the next. The cards tend to stick to one another too. The cards are cheap and flimsy. The price seemed good for 500 cards but the nicer cards are easier to flip through and worth the money
As with most paper products lately they are thinner than previous purchases. Lines on the back would be a great option. Packages in smaller quantities 100 or 250 would be appreciated.