Here are some great interactive resources for practicing U.S. States and Capitals. It includes a Notebook activity, interactive web activities, and even a fun video.
AnimatedatlasI really enjoyed the Growth of a Nation activity from the Animated Atlas website. The presentation takes you through the growth of the United States from 1780 all the way through to the current day.
The website is fully interactive and works great on the Smartboard; it allows you to pause and restart the presentation; it allows you to slide the time line pointer to advance to different time periods, it allows you to click on the states to see more detail; and it even provides a scrollable time line that organizes pertinent data into key topics.