This special issue of the National Earth Science Teachers Association journal, *The Earth Scientist*, is sponsored by the Cooperative Institute for Climate and Ocean Research at the Woods Hole Oceanographic Institution and is focused on the world's oceans. The articles, by teachers, scientists, and science educators from across the country, cover a range of topics - polar research, coral reefs, ocean acidification, air-sea interactions, climate research, the Census of Marine Life, ocean drilling, and information on cutting edge observatory initiatives.