Here is an introduction worksheet to the Structure of DNA video from Teacher's Pet (video link is embedded at the top of the worksheet). There are 23 questions that go along with the video. There are also extension exercises from around the internet (which I do not take credit for), links are provided for a hands-on DNA building activity, computer game/simulation from the Nobel Peace Prize website, and a very simple Strawberry DNA extraction laboratory, for students to easily follow along!
This worksheet can be used in class, at home, or for review. Great for middle schools students who are being introduced to this topic. Good review for high school students who need to have a quick review.