A coalition of environmental research institutions in Ithaca, NY have produced a resource for high school science teachers teaching climate change. You can download it for free from their website, or order a paper copy for $25, and they are also running a crowd-funding campaign to send a copy to every high school science teacher in the US.
There’s also a new MOOC available via Coursera for the general public who are interested in climate change, want to take action, but don’t feel like they know how to do it. I think it costs something to take the course, but there are scholarships available. The course was developed and is taught by professors from the University of Michigan and elsewhere. I particularly like this idea because it focuses not just on education, but on how individuals and groups can take action to address climate change.