How many years of experience does a teacher need before he/she can teach senior high school students?

One of my old teachers was straight out of university and was my science teacher in grade nine and a 30–1 chemistry teacher.

@The_Clouded_Mind Thanks for your answer, but what do you mean, 30–1 teacher? What do the numbers mean?

It often depends on what openings the school has when the teacher is hired. Usually, those who have been at the school the longest have first pick of the classes they want to teach. If none of the established teachers want a particular senior-level class, then a new teacher could teach it. Most things in schools have more to do with tenure than ability.

@julia999
sorry it means grade 12 advanced placement.
okay my school had grade 9–12 and it started grade 10 they had 10–1 10–2 and 14
10–1 means above 65% in that class 10–2 it under 65% over 50% and 14 was under 50%
same as grade 11 it was 11–1 11–2 and grade 12’s are 20–1 20–2.
If that makes sence.

@bobbinhood Thanks, I suspected as much

@The_Clouded_Mind I understand now, but it sounds awfully confusing!

@julia999 yeah it is confusing lol =S

The answer to this question parallels the answer to the question of “How many drinks can an alcoholic handle?”

One is too many, and twenty-five are not enough.