This series of two lessons uses cutting-edge scientific research (by Dr. Josh Lord and Dr. Jim Barry) on the effects of climate change on communities in the intertidal. Through a combination of a dynamic presentation and several videos, students are introduced to climate change’s effects on the ocean (ocean acidification and temperature increase) and what is known about how ocean organisms are affected. They examine the behavior, growth and interactions of the four species that Drs. Lord and Barry investigated. Then students read and interpret graphs and construct a scientific explanation based on data from this research.