A very nice article from a science teacher who discusses his effort to teach his students about climate change. He describes how he deals with kids who do not support it. There is also a comments section where readers have posted some insightful ideas. This is a good place to go to get started.
A huge collection of videos and podcasts revolving around the topic. They are from an ongoing series, so many are quite recent. While a lot of the information may be too detailed for teachers, there is still a wealth of knowledge to be gained here. They specifically address how to teach the topic to students in several episodes.
A listing of hardcore scientific facts about climate change direct from the National Oceanic and Atmospheric Administration. This site is a great place to go to learn the truth and get smarter about the topic.
While this film has received as much criticism as praise, it still does a wonderful job or detailing the impacts of humans on the planet. It is engaging, informative, and jam-packed with scientific data.
An introduction to the topic of climate change and why it is controversial. There are several links to additional resources. I like the format of this page and the information it has to offer. I does a nice job outlining the topic.