"Blink your eyes and say click!" Cam Jansen, David Adler's heroine with a photographic memory, has captured the imagination of millions of readers. The prolific Alder has also written several picture book biographies for children, bringing historical figures to literary life. In this exclusive video interview with Reading Rockets, David Adler discusses the "Supermarket Room" of his teaching career, simple math methods, and the reason why Benjamin Franklin never wore a wig.