A CLEVER STORY: One-third of schools are using an app that close followers of the edtech industry have surely heard of. Clever, a San Francisco startup that’s become synonymous with “single sign-on” for education, claims it is used by 44,000 schools across the US. The company offers an API that allows schools and districts to safely integrate with over 200 apps and manage what data is being shared. Here’s a smart look at company from NPR.