First we did our homework and found out what was the largest size poster we could reasonably have printed. We found that Staples can print things on engineer sized paper or large-format sized, which is 24x36 inches. Perfect. I formatted the design to fit. Then I figured out based on the design of the large poster, how big each little card needed to be. Each standard card is 5.25 x 7in, which is kind of an off size, but since we printed the cards at home on card stock (cheaper than having Staples print them) I just cut some card stock to that size and ran it through my printer.
We had Staples laminate the large poster, but since we printed the smaller cards ourselves we used their home laminator on those. Technically, you wouldn't have to laminate any of them, but it makes it a bit more durable and since little kids will be handling them all year, it was a good investment. (In case you are wondering it cost about $25 to print and laminate the large poster. The smaller cards only cost us the price of the paper and ink, and the laminating materials, which we already had.)
Here's the files if you want to print your own! You're Welcome!
My Gospel Standards poster (24x36 in)
My Gospel Standards cards (5.25 x7in)