Special thanks go to Myong-Hi Nina Kim, of SUNY College at
Old Westbury, a member of the U.S. National Commission on
Mathematics Instruction for facilitating and setting up meetings
for me with public school teachers during my 2012 summer
visit to Seoul. Appreciation goes to Hyokchon Kwon, Master
Teacher with Seongsan Middle School in Seoul, for sharing his
class material with me. I also wish to thank both the American
Mathematical Association of Two-Year Colleges (AMATYC)
and NCTM through a travel grant from the National Science
Foundation (NSF; DRL 1127579) for their partial support of
my travel expenses associated with my visit to South Korea.