If you're looking for a way to introduce interactive activities in the classroom, particularly in the earth sciences and geosciences, this website has an endless bounty of activities. While the Merlot link takes you to the "Exploring Teaching Examples" page, I found it much easier to navigate by clicking on "Topics and Themes" or "Browse Courses" in the left-hand menu. Each item under "Topics and Themes" includes a rationale for why you would want to use that methodology in a class, as well as links to example lessons for that activity. While all the examples are rooted in geoscience, many of the methodologies - such as just-in-time teaching, gallery walks, and role plays - can be adapted to other disciplines. I will be bookmarking this page whenever I need a new activity for class.