NextDayLabels - Laser Printer Blank Perforated Cards 6 per Page (Salmon, 300 Sheets) - Perfect for Business Cards, ID Badges & Loyalty Programs

I used these to make flashcards. It took about 10 minutes of math and diagraming to figure out how to properly print these two sided from a document that has one card per page. Print order for a 6 card page is 1 3 5 7 9 11 13 4 2 8 6 12 10. Once I got that worked out the printer printed a set of 700+ flash cards in a breeze vs. it printing one at a time with regular index cards. For some reason it takes my printer 30 seconds to print a one sided index card, but it can print these sheets double sided (6 cards at a time) at 28ppm (which is 168 cards per minute). Even with a stack of 30 sheets, the perforations allow you to quickly separate the cards.