This episode gives an introduction to the Tactical Games Approach model that stemmed from Teaching Games for Understanding (TGfU). 

Risto Marttinen is an assistant professor at George Mason University in Virginia, USA. You can find him on twitter at the innovative handle of @RistoMarttinen 

Risto runs an integrated after-school sports and literacy program called REACH. He has conducted research on this program over the past four years. www.reachafterschool.org 

Risto's research interests include after-school physical education curriculum serving youth in under-resourced communities, student attitudes, research on teaching in physical education, and the integration of academic subjects into physical education. 

Original works on this model: 

Griffin, L. L., Mitchell, S. A., & Oslin, J. L. (1997). Teaching sports concepts and skills: A tactical games approach. Human Kinetics Publishers (UK) Ltd.

Griffin, L. L., & Butler, J. (2005). Teaching games for understanding: Theory, research, and practice. Human Kinetics.

and the Metzler curriculum book:

Metzler, M. (2017). Instructional models in physical education. Routledge.