“The first interactive marine science textbook for the iPad is called Cachalot (French for “sperm whale”). It’s a free, app-based book that covers the latest science of marine megafauna like whales, dolphins and seals with expert-contributed text, images and open-access studies. Through a digital publication system called FLOW, the book also offers students note-taking tools, Twitter integration, Wolfram|Alpha search and even National Geographic “critter cam” videos.”