This is a great activity for small or large classes. I illustrate all of the drawings myself and try to incorporate more that just the drawing. Teachers may practice not only the professions but what is going on in the image. I have provided a list with a brief description of each profession which the teacher may want to enhance even further. This is so helpful for working on their communication and comprehension skills. The packet comes with 20 bingo cards and a template if you need to make more. It also provides activity suggestions, squares for covering the bingo cards and individual images and names of each profession which may be used to pull from a bag when calling them out No real preparation is needed except for cutting up the small squares for playing unless you want to make more cards. If that is the case, I always have my students do it as an extra credit assignment ! Cards should be printed on thicker paper so that they will last longer. I highly recommend that you laminate them. They will last you forever.