This EdSurge article provides an important service in analyzing EdTech business models. I have suggested in several of my own posts the serious challenges facing companies hoping to survive in the education “market” – educators want free, but there is a negative reaction to the way “free” services are funded – ads and information collection. The article seems to conclude that “premium” services are the most likely strategy we will see in the short run. This approaches provides some free services with the intent of building a user base and hopes that a reasonable percentage of these users will find value in a service and then spend money for the full range of services/content the company provides.