We use a graphic to indicate age level recommendations for Primary, Intermediate, Middle School, and High School. Yellow indicates the target age group, shading to blue for age groups which should still find the material usable. Be guided, but not bound , by these recommendations. Some units have Teacher Talk - lesson planning information. Look for the Teacher Talk graphic , which will take you to the Teacher Talk page.
Most units have student activities, indicated by .
The units which have background information are noted by . Some concepts of ocean currents. Track the Drifter Buoys Practice Activity Introduces how to plot drifter data. An explanation of the data and links to the spreadsheets that contain the data. Ocean Color Viewed from Space Plant life in the ocean.