Yang studied English at the Hankuk University of Foreign Studies. After discovering that she is happiest when talking to curious children, Yang began writing children's books. Her publications include I Gave My Allowance to Mommy to Keep: Can I Get It Back?, Quiz: Hazardous Substances!, Are Hamburgers More Dangerous than a Steak?, Future Jobs Only I Want to Know About, and Freedom vs. Regulation, Which Comes First?