Eight lessons from building card decks for diversity and inclusivity. Medium.com, March, 2018. Covers many of the reasons why cards are the best for building prototypes and ideating.
Tools, Tips & Resources Teachers Must Know to Learn About Gamification of Education. (EdTechReview.com, Feb, 2016)
Kolb, D. A. (2014). Experiential learning: Experience as the source of learning and development. FT press. (22-page PDF excerpt)
Schell, J. (2014). The Art of Game Design: A book of lenses. AK Peters/CRC Press. (google book) - Everything begins with the game designer, which in turn requires knowledge of design thinking and deep empathy; "the designer creates an experience."