This is an article detailing the alarming rate at which the Arctic is changing. The article goes through the specific examples of Sea ice, Greenland, Wildfires and Permafrost. This is a readable article for advanced middle school and high school students, and an excellent resource for teachers.
Students will use marshmallows to simulate toxins in the environment. Concentrations of these toxins will be modeled and calculated as they bioaccumulate up the food chain. Methylmercury and POPs are substances that bioaccumulate in the Arctic food chain. OASIS scientists studied these in Barrow, Alaska. (See Ocean Atmosphere Sea Ice and Snow (OASIS) Project at www.polartrec.com)