There are probably more problems in the world than I care to mention, though the environment is one that always comes to my mind. Whether it is fresh drinking water or devastating fires (as seen in different parts of the world these past months), the well being of our planet lies in our hands and every contribution towards its health is needed.
What Is the Most Serious Problem Facing Earth? is a lovely resource to use - and not only for Earth Day.
What is the Most Serious Problem Facing Earth is a webquest which includes a lesson plan for teachers, including steps and ideas for the classroom before learners begin their research. It also includes support for teachers who teach younger learners.
Google Science Fair has created a mini library
15 Interesting Ways To Start Class Tomorrow
Viewing Comprehension Strategies: Watching Videos Like You Read A Book
10 WORDLESS VIDEOS THAT TEACH PROBLEM SOLVING
The Environment - Resources including videos, games and more