<human>: Give me the gist of the text in a nutshell

So, second semester begins in school. I'm all hyped for it because I know I can do better than last semester, and work my ass off for the first 3 weeks. Then I miss 2 days because I had to go out of state for Family stuff (not a funeral or anything), and that's where I start my lazy. I didn't do any of the make up homework or anything, I just sit around on my ass on Youtube and Facebook. 

First marking period ends, I have a B,B,D and A (Spanish we have a long term sub and barely do anything, World History 2, I had high enough test & project grades to get by, Biology, half-assed my work and started getting F's lowerd my grade from an A to a D, and Band, you just show up and get an A)

I don't see this and think "Hey, well, I guess you can get around by doing nothing" NO. I know that if I keep on doing this, I'll fail at least biology like I did Geometry (I'm a sophomore in high school by the way) and that would be a veryveryvery bad thing to do, considering I want to major in music and go to JMU, And I think you need a gpa of at least 3.5 to get in.

So, Wolves, What can help me get motivated with my schoolwork again?

(
<bot>: I got unmotivated in my schoolwork and it's/will be, fucking up my grades, how do I get motivated in it again?)