A really, really horrible math teacher.

I'm currently a high school student taking an advanced algebra 2 class, and even though it is the start of the quarter, I have a high D average, which is not acceptable for me under any circumstance. I blame this on a rather apathetic teacher who only teaches abstract concepts, as well as my lack of motivation caused by said apathetic teacher. I have decided to use the class as a supplementary resource, and use other resources such as khan academy to help me learn the material and ensure that I get a good score on my end of course exam. Does anyone have other math resources for me to use, and can someone help encourage me so I won't be so lazy anymore?