Midterm defficiency

So this past week, i found out that i have a midterm defficienc in my maths 111class. When i heard about this, i was immediately mad at my teacher because she is a very bad teacher. she does a lot of the example problems wrong on the board and then expects us to be able to do them on the homework. After i thought about it for a while, she is not the one that i should be getting mad at, but rather i should be upset with myself. If i am not understanding the lessons from her teaching me in class, i need to go study the lesson and try to tech myself. I really need to pick up my studies in that class.