According to Jungian analysis, everyone in the dream is you. What was/is the relationship btw you & this teacher? Any clue who the 2nd teacher could be? How do teachers figure in your life--do you tend to hold yourself up to classroom standards in life?

As to the suicide theme in the classroom, this could go back to the actual year (even class) you had that particular teacher. Something you or another student wrote for class, or something you read for class. Or perhaps something that happened that year. Any suicides in your school, among students, faculty, their families, etc?

Dreams are uniquely personal, but not always intimately personal. Often they're more about someone or something we focus on than actually about ourselves--even recurring dreams.

Hope this helps, or at least points you towards something helpful.