Everything you need to understand or teach Riptide by Douglas Preston.
"On an afternoon in June 1790, a Maine cod fisherman named Simon Rutter became caught in a storm and a strong riptide. His dory overloaded with fish, he went badly off course and was forced to put in at Fog bound Ragged Island, six miles off the coast. While waiting for the heavy weather to pass, the fisherman decided to explore the deserted spot." (Prologue, pg. 1) Thus begins the exciting adventure, Riptide...
Riptide Lesson Plans contain 114 pages of teaching material, including: