There are many, many websites devoted to Shakespeare's life and plays.. Here are two that I have found to be useful. If there are others that you find to be entertaining and useful, email me and I'll try to list them here.
Absolute Shakespeare and the Shakespeare Resource Center have just about all that you need to enrich your study of Shakespeare--biographical information, help with Shakespeare's language, famous quotations, summaries and related sites on all thiry-seven plays, and a generous selection of links to other significant websites, which of course link you to further sites.
The Shakespeare Resourse Center's "Shakespeare's Works" page (at the bottom) has sections on both literary criticism and scholarly journals that lead to some interesting reading.
[The following three sites come through North Quincy High School English teacher Sarah Poulin]
Shakespeare's biography is presented in A Shakespeare Timeline, which gives central details of his life from 1564 to 1616.
The authorship debate (that won't go away) is presented here in a PBS Frontline page, titled "The Shakespeare Mystery," which gives links to many other site on the topic of just who wrote the plays attributed to William Shakespeare of Stratford.
Take a virtual of tour of the Globe Theater, sponsored by Clemson University and its 2007 Shakespeare Festival.
Find texts to each of Shakespeare's plays at The Complete Works of William Shakespeare, courtesy of Jeremy Hylton and MIT's newspaper, The Tech. Students reading. You can also click here to get directly to Romeo and Juliet or Hamlet.