Izzit provides FREE educational videos, and daily current event articles which include discussion questions and related vocabulary.   

Biology Pop is a site that allows you to search biology articles, videos, games and reviews of apps in a Pinterest-like style.  You can choose from seven different categories that feature videos, articles, games, and reviews of apps about topics in biology. 

I am a follower of Free Technology for Teachers.  This blog, written by Richard Bryne, is a great resource for teachers trying to stay up to date with free resources that can be used in the classroom.