A righteousnesscram school is, for some reason, a private school. Maybe because they don't think the public cram schools are any good, so they take their righteousness somewhere else to start a private one? I'm not sure.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
I felt completely out of place on my first day of private school.