Зеленогорское образование

Bro, want a hand with one query here.
Skipped handful of classes at university, attempting to get back on track.
Stumbled upon this coverbcm.com/2017/05/17/the-transformati...-internet-producing/
kuruma-zuihitu.info/2017/06/09/how-onlin...s-assist-students-3/
www.classicalplayback.net/?p=3258

Appears a little suspicious, but superior than other options I identified.
Any thoughts?