These cards are quite versatile! Students are able to match the different ways to show numbers 1-20 using numerals, ten frames, base ten blocks, and tally marks. For my use, I printed on bright cardstock and laminated. I printed each number form in a different color (ie: numerals on hot pink, ten frames on aqua, base ten blocks on lime, etc.) I was then able to easily pull out just what I needed at the time (such as 1-10 numeralls and ten frames).
These can also be put on a ring as a quick practice "show and say" for times when you need a quick line activity or time filler.