I first went and previewed some activities, and the next thing I looked at was pricing. As educators, we are always curious to find out how much something costs! Imagine my surprise when I saw that as a teacher, you can register and get a free account with Studyladder. Here is a video clip about Studyladder:
After creating my own account, I went in and started looking at some of the Literacy resources. I opened the one for Kindergarten and Concentration game. When I got to that page, I noticed in the upper right corner a link to "Open Whiteboard version". Score!!!
Studyladder also has activities for Math, Science, Music, and Art. Each interactivity has a whiteboard version so that you could use these on your Interactive White Board. Why not go and check out this resource for your class?