I need a tutorial on how to lock in

I've been procrastinating so bad for the past few months and actually need some tips on how to better focus on work. 

I feel like no one ever does any work in my classes so I feel very unmotivated to do them in class. And I can never do my work at my house because I just feel like sleeping.  I've feel like I should try working at a library but my parents are strict like that.

pls help a dude out spacehey!!