Download or read book Secrets of the Ocean Realm: In The School: Classroom Activities written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Features a high school learning activity about tides, presented on Public Broadcasting Service (PBS) Online. Includes objectives, background information, materials needed, time required, procedures, and how to evaluate the activity. Offers a related activity for lower grades.