Hyo-jung Choi

The Effects of Estimation Activities on Operation and Measurement Abilities of Children

C. Chung, Hyo-jung Choi, Miyoung Kwon, 2009 .

An Inquiry into the Effects of Early Childhood Teaching Factorsand Home Environment Factors on Young Children’s Concepts of Number

Chung， Chung-Hee, Hyo-jung Choi, 2007 .