Here's the best website I've found to help students read Shakespeare's plays:
http://nfs.sparknotes.com/ Click on the title of the play you're reading, then on the act and scene you want. You'll find original Shakespearean language on the left and a modern-day "translation" on the right.
Here are several other really good websites about Shakespeare, his works, and his times:
http://shakespeare.palomar.edu/
http://www.shakespeare-online.com/
http://www.bardweb.net/
http://www.enotes.com/william-shakespeare/
http://www.sparknotes.com/shakespeare/