Interdisciplinary Whale Unit (Pre-K-1)
Students can learn about whales through all subject areas using this guide. Lessons, activities, and Internet resources are included.
http://www.libsci.sc.edu/miller/whales.htm

Shark Surprise! (Pre-K-1)
Students create their own card game in this lesson. The game is a variation of Old Maid, but uses pictures of fish and a shark instead. Students create and get to keep their own deck of cards.
http://www.eduplace.com/rdg/gen_act/fishy/shark1.html

Under the Sea Art Activity (Pre-K-1)
In this lesson, students create their own undersea environments based on the information they have learned about the ocean.
http://www.eduplace.com/rdg/gen_act/fishy/under.html

Fish Facts (2-3)
In this lesson, students prepare for taking care of a fish tank in the classroom. Through researching and instruction, students learn about the types of fish to have in a tank and how to take care of them.
http://www.eduplace.com/rdg/gen_act/fishy/facts.html

Why is the Sea Salty? (2-3)
In this experiment, students learn about the salt in the sea. They will learn about the concentration of salt as well as what happens when salt water evaporates.
http://www.col-ed.org/cur/sci/sci166.txt

Cartesian Diver Experiment (2-3)
Using a condiment packet and a jar filled with water, students can learn how Cartesian divers are able to stay below the ocean surface in this science experiment.
http://www.doscience.com/act_archive/condiment_diver
/condiment.html

Buoy Craft Activity (2-3)
Students can create their own ocean buoys using the directions at this site. Have students create a color key for the buoys based on what they want the buoys to stand for.
http://octopus.gma.org/lobsters/lobsteractivities/makingbuoys.html

Gone Lobstering (4-5)
Older students will enjoy learning about lobstering in this math activity, which involves pretending to be part of a 'lobster gang.' In this economics activity, students must figure out how much it will cost them to catch lobsters and whether or not they will make a profit.
http://octopus.gma.org/lobsters/lobsteractivities/gonelobstering.html