I just wanted to share this really great resource for teachers. It's the latest NOVA series about Extreme Ice. They recently created some videos about the Bering Sea which are short and well done. Here's the info from their web page:
On Thin Ice in the Bering Sea:
In this series of video stories, explore the past and future of the fast-changing Bering Sea region, its culture and people, and the new polar science that is emerging from an expedition on board the Coast Guard cutter Healy.
In addition to these videos, there is additional information and other videos about the polar regions, including a link to 'Ask an Expert'. http://www.pbs.org/wgbh/nova/extremeice/