Hi,Klassen,The room or people of a groupe(in school(mostly)
Geht bitte zurück in eure klasse(please go back to your classroom)
But ,Unterricht, thats what you have in school
Der unterricht war langweilig(The tuition was boring)
What you said is correct. It wouldn't be used as much as using just the word 'teacher,' but there are plenty of examples where you would want to specify that the teacher is female. Did you report it when it told you it was wrong?