There is now clear longitudinal evidence that game-based learning is gaining traction across the globe.  According to The 2016-2021 Worldwide Game-Based Learning Market, a report released August 2016 from Ambient Insight, worldwide revenues for game-based learning products reached $2.6 billion in 2016. The study reports that the global five-year compound annual growth rate (CAGR) is a robust 22.4 percent, and predicts that revenues will surge to $7.3 billion by 2021.