Can't find anything about the Educational License

For quite some time I've been thinking about reaching to a private school - a regular one where kids atend to you know, Maths, History, not a programming one - here in Brazil and offer them some kind of course that I would prepare myself, where I would teach Unity programming to interested kids using the school's lab, the thing is that I figured that I would need a legal support for that, the problem is that information regarding the Educational License seems to be amazingly hard to find...for some reason I guess.

My research through the web has led me some light on the subject, some information might be outdated tho, some almost a decade old but it seems that the Educational License isn't an actual Unity License but rather a Legal one...? And I would need a Student License for each computer in the lab...? And I would have to pay for EACH ONE of the Student Licenses...? Somewhere...monthly...annualy?

I've already sent an email to Unity but I REALLY doubt I would get a response, even less a clarifying one, so I fugured I would come here and ask about it to someone who could inform me on the subject. Thanks in advance.