Abstract
This paper provides an overview of my research projects that are part of collaborative research program seeking to illustrate the complexity of excellence in mathematics education. The aim of the first two projects were to the theoretical and empirical grounding for an innovative approach in differential equations called the Inquiry Oriented Differential Equations (IO-DE) project. The aim of the third project was to provide a model of professional development of mathematics teachers in South Korea.
Oh Nam Kwon
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