Hi DarkCell,
We do allow educational institutions to pay for a seat and allow access to all of their students. Please discuss this with your school.
https://www.unrealengine.com/faq#education
What provisions does the Unreal Engine 4 End User License Agreement (EULA) make for educational use?
All academic institutions are permitted to sign up for a subscription. You can install the Unreal Engine on all of your computers and allow all users, such as students working on those computers, to use the engine.
If a student wants to install Unreal Engine 4 on a personal laptop, or to release a product developed on an academic computer, he or she must sign up for a subscription.
What perks are there for schools and educational institutions?
We allow all Unreal Engine 4 users who sign up to install the engine on multiple machines. Schools have our permission to pay for one seat and ‘flash’ or image Unreal Engine 4 to multiple machines across labs, and access C++ source code via GitHub. No lab fees!