http://caselaw.findlaw.com/court/us-supreme-court this website also works. It has lots of cases and supreme court opinions. It also give you the feeling of being a lawyer.
A fun video for all of the iN and Pe to cringe at... the LSAT is against us ;)... but dont worry we will destroy everyone in court :) https://www.youtube.com/watch?v=qJnROc-JHPw