Shakespeare Uncovered from PBS Learning Media. That is a nice resource for helping students understand the things that influenced Shakespeare's writing. If you're looking for some other resources to help your students understand the works of Shakespeare, take a look at the materials below.
Shakespeare Animated is a YouTube channel containing twelve playlists
ten of which are animated adaptations of Shakespeare's most famous
plays. Some of the animated plays that appear in the Shakespeare
Animated playlist are Romeo and Juliet, Hamlet, MacBeth, and The Taming of the Shrew.
John Green's Crash Course videos about English literature includes two videos about Romeo &
Juliet. I've embedded the videos below.
TED-Ed hosts a lesson titled Insults by Shakespeare. In addition to explaining the insults used by Shakespeare the lesson also explores some of Shakespeare's other uses of dialogue.
L.A. Paun used LiveBinders to create and share a nice collection of Shakespeare resources. The LiveBinder has a section for Shakespeare in general and sections devoted to Romeo & Juliet, MacBeth, Hamlet, and Twelfth Night.
Shakespeare's Original Pronunciations
could be a good resource to support classroom readings of some of
Shakespeare's works. Take the guess work out of the pronunciations by