STC the first educational token
It is definetely not the first. I remember few, but dont remember their names. That tells you a lot about their success. LEDU is one: https://coinmarketcap.com/currencies/education-ecosystem/ https://ledu.education-ecosystem.com/
I also see a lot of similar projects, but none have really succeeded with this idea. So I wouldn't care and invest in projects like that, its price will definitely crash many times in the future and become scam.