University of Minnesota
"Active learning engages students in the process of learning through activities and/or discussion in class, as opposed to passively listening to an expert. It emphasizes high-order thinking and often involves group work." Freeman, et al., 2004.
Source: Freeman, S., Eddy, S.L., McDonough, M., Smith, M.K., Okoroafor, N., Jordt, H., and Wenderoth, M.P. (2014). Active learning increases student performance in science, engineering, and mathematics. Proceedings of the National Academy of Sciences USA 111, 8410-8415.
“Instructional activities involving students in doing things and thinking about what they are doing” (Bonwell and Eison, 1991).
Source; Bonwell, C. C., and Eison, J.A. (1991). Active learning: creating excitement in the classroom. ASH#-ERIC Higher Education Report No. 1, Washington, D.C.: The George Washington University, School of Education and Human Development.
Here are some links to other colleges and universities "active learning" information and ideas for implementation.