Middle schoolers examine and research the organs of the respiratory system. They participate in a vocabulary card matching game, create a graphic organizer, and participate in an experiment titled, Floating on Air.

Though the walrus spends roughly one third of its time on land, it eats organisms that live on the bottom of the ocean. The first in a series of five, the lesson uses a variety of plant and animal cards to have scholars build an arctic...

Two blooms of phytoplankton, instead of just one, now occur in the Arctic due to declining sea ice, which will have widespread effects on the marine life and climate. In small groups, participants build an Arctic food web with given...