Here is another way to use paint sample cards in your classroom:
I took some of the larger cards and cut them in half. At the end of learning about the periodic table, I handed each student a card and instructed them to write as many facts as they could in about 2-3 minutes. I then had each student randomly tape their card to a piece of chart paper. Now we have a poster that we can use as a review for our state testing. This is also a great formative assessment tool! The teacher could look over the information posted on the cards and if there was an important concept not written about then she/he could do a little reteaching.