Free Resource - Classroom for PBS Nature Series
Being public supported, PBS provides many videos that are available for teachers to use in their classrooms.
But did you know some of their series provides teaching resources free for your use? Check out the series Nature. If you go to the Classroom section, they have provided video clips from episodes, along with teaching resources and relationship to educational standards. Notice on the example below they list the grade levels that the resource is appropriate for along with the permitted use of the materials -