Good for them! I was recently in charge of a team that developed a website to teach remedial algebra to children, which is now used extensively in Florida middle and high schools. The signin system, using Clever as a bridge, incorporated districts' native signin systems, so teachers and students could just use their familiar school logins to get in the system. Out of the gate we had to support over half a million students.

Working with their API was really a delight, and I certainly have experience with some less than enjoyable services. Apparently public school IT systems are notoriously a pain in the neck to work with, but Clever just abstracts all of that out so you don't have to worry about it. Clever's development team was also very competent and professional. They seemed to really know their stuff and went out of their way to help us be successful. Assuming they take proactive steps to protect teacher and student personal data I wish them all the success in the world!