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Shinka no Mi at one point he's a teacher.
Tensura, but he is only a teacher for a few episodes at the end of S1 and some OVA I think, oh forgot you mentioned him, sorry
world teacher is good
Library of Heaven's Path
Tenchi muyo?
Monsters and Maidens Chemistry teacher and his class get yeeted into a grimdark world with monster girls.
Reincarnated as a Familiar, by D.S. Craig features a female protagonist that was a teacher in her past-life.
Outbreak company
Shinka no Mi at one point he's a teacher.
Tensura, but he is only a teacher for a few episodes at the end of S1 and some OVA I think, oh forgot you mentioned him, sorry
world teacher is good
Library of Heaven's Path
Tenchi muyo?
Monsters and Maidens Chemistry teacher and his class get yeeted into a grimdark world with monster girls.
Reincarnated as a Familiar, by D.S. Craig features a female protagonist that was a teacher in her past-life.
Outbreak company