Valentine, K. D. (2012). Space and perspective. [Webpage: Space and Perspective] http://spaceandperspective.com/ .
Kopcha, T. J., & Valentine, K. D. (2010). Fractions to the core: Teaching for conceptual understanding. [Webpage: Fractions to the Core] http://tothecore.coe.uga.edu/ .
Phenomenological Research: https://keriduncanvalentine.com/2013/01/16/phenomenology-research-blog/
Meaningful Learning with Technology: https://ugaedit.wordpress.com/
Mathematics Methods for Elementary Teachers: https://elementarymath2015.wordpress.com/