ScrollMotion, a software company that specializes in translating print media to digital devices, most notably the iPhone and iPod touch, has signed deals with a number of leading educational textbook publishers to bring their textbooks, test-prep, and study guides to the iPad. The Wall Street Journal reports that publishers including McGraw-Hill’s education unit, Houghton Mifflin Harcourt K-12, Pearson Education, and Kaplan Inc. have all signed…