Karl Kosko earned his undergraduate degree in Elementary Education, with a minor in mathematics, at Winthrop University in Rock Hill, SC. While teaching in the Rock Hill School District, he also received his M.Ed. in Middle Level Education with an emphasis in mathematics. Later, he attended Virginia Tech and earned his doctorate in Curriculum and Instruction with an emphasis in Mathematics Education. He then completed a post-doctoral fellowship at the University of Michigan with the GRIP project before taking a position at Kent State University. His research interest focuses on how mathematical meaning is conveyed, including studies of mathematical argument & discourse, multiplicative reasoning, and using representations of practice in elementary mathematics teacher education.