I'm going to yell at my teacher
Given that she's in a position of authority maybe you should try speaking to her before resorting to yelling.
Yes I have, but not about this particular issue.
It can be frustrating to not be listened to by a teacher but yelling is not the answer. It could damage your relationship with them and get you bad grades.
Then I will just get bad grades.
Bad grades in school can effect your future. Having a civil discussion with your teacher may settle the issue without you having to be disrespectful towards her.