On September 17 to 19, the e-Learning Korea Exposition 2014 took place at COEX. EBS won the first place award at the 10^th e-Learning Business Contest for its exploratory and interactive digital mathematics textbook. The textbook, which caters to fifth and sixth graders, is a product of the two-year thorough research and development that was headed by In-suk Cha, a senior researcher at the Contents Division at EBS. The textbook users benefit from the three-dimensional simulations of shapes, video clips and lectures on mathematic concepts, and interactive problem-solving designs.