Here is a Cultural Literacy worksheet on Woodstock. This is a half-page worksheet with a nicely symmetrical three-question reading followed by three comprehension questions. Even with this brevity, as is typical of so many of the squibs found in The New Dictionary of Cultural Literacy, this is a surprisingly thorough general introduction to both the Woodstock Festival and its cultural legacy.
If you find typos in this document, I would appreciate a notification. And, as always, if you find this material useful in your practice, I would be grateful to hear what you think of it. I seek your peer review.