Ga-Metru Schools

Nokama's Classroom was where Nokama taught her students when she was a Matoran. After class was dismissed, sometimes Vhisola stayed after for tutoring. It was destroyed or severely damaged by the Great Cataclysm and abandoned by the Matoran when they moved to Mata Nui. It was repaired 1,001 years later by the Staff of Artakha.

It was later abandoned when the Matoran evacuated to Spherus Magna.

Dark Mirror
In the Dark Mirror universe, the classrooms were the re-education centers, ran by Gali and Karzahni to train disobedient Matoran.