The National Wildlife Federation (NWF) has some great resources for educators on their web site. There is a news section, wildlife animal information and resources, environment and global climate change resources, and much more.
They have wildlife cameras that you can view, such as the Eagle Cam, an incredible Wildlife Library with information about different animals and species, and Wild Places where you can virtually visit and explore some great wild parts of America.
There are outdoor activity guides and things to do outside, Wildlife news reports, and Global Climate Change resources.
The Kids Page is well done also, explaining topics with children in mind, animations, videos, explanations, and even mobile apps.
The NWF also offers free webinars on a variety of topics.
This is a great resource for teachers and students to use when studying wildlife, nature, and the environment.