Marveling at the Marine Biome from Arizona State University offers a wealth of resources to help you teach about the largest biome on Earth. You'll find articles, worksheets, and scientist interviews explaining the structure, characteristics, and ecosystem features of both the open ocean and coastal areas.
Ocean Challenge is a compilation of excellent resources for educators, including lesson plans from National Geographic and engaging animations that illustrate the depth and size of the oceans.
Ocean floor model activity and diagram for your ocean floor lesson.
The classroom resource Oceans Alive! is from Boston's Museum of Science.
Lesson Plans for the Ocean
Here is a great visual of the earth from the highest peaks to the lowest depths. Comparisons of oxygen levels and historic locations all in one scrollable image.
Here is a great YouTube video explaining how surface waves become surf that crash on the beach.
There's lots for you and your students to discover at the Natural History Museum. The deep ocean and frozen oceans along with the many forms of ocean life are just a few of the interesting topics available.
Sonar allows scientists to see the ocean floor. This video tells the story of how they do this. From National Geographic.
Online games/quizzes created by other teachers or their students related to your ocean topic can be found at purposegames.com – take a look at the large list of ocean related topics they have available.