I have typed vocabulary terms and definitions that were important for my student's math foundation. I cut out the words and terms from the computer paper and taped them onto cardstock. I taped the term to the "front" and then taped the top of the card onto the word wall. I then flipped the card over and tapped the term to the back of the card. Students were able to see the words at all times and could flip the card up in order to remind themselves of the definition for the term.