Hart, Vi. Vi Hart [Youtube Channel].
Lockhart, Paul. Measurement. Cambridge: The Belknap Press of Harvard University Press, 2012
The National Museum of Mathematics. MoMath [Exhibition]. New York.
Strogatz, Steven. The Joy of X. New York: Houghton Mifflin Harcourt Publishing Company, 2012.
New York Hall of Science. Mathematica [Exhibition]. New York.
Polster, Burkard. Q.E.D.: Beauty in Mathematical Proof. New York: Walker Publishing Company, 2004.
Dehaene, Stanislas. The Number Sense: How the Mind Creates Mathematics, Revised and Expanded Edition. New York: Oxford University Press, Inc, 2011.
Lakoff, George and Rafael E. Núñez. Where Mathematics Comes From. New York: Basic Books, 2000.
Common Core State Standards Initiative. Common Core State Standards Initiative, Mathematics [Website].
National Council of Teachers of Mathematics. National Council of Teachers of Mathematics [Website].
Lockhart, Paul. A Mathematician’s Lament [Essay]. 2002.
Meyer, Dan. Dan Meyer: Math class needs a makeover [Video file]. Ted.com, 2010.
Wolfram, Conrad. Conrad Wolfram: Teaching kids real math with computers [Video file]. Ted.com, 2010.
Victor, Bret. Kill Math [Website]. 2011.
Froebel Foundation USA. Froebel Foundation [Website].
MoMA. Century of the Child: Growing by Design, 1900–2000 [Exhibition].New York, 2012.
Brown, Stuart. The National Institute for Play [Website].
Rand, Paul. Design and the Play Instinct. Washington D.C.: Corcoran Press, 2012.
Becker, Carol. Countervaillance: Educating Creative Practitioners in Thinking in Place: Art, Action and Cultural Production. Boulder: Paradigm Publishers, 2009.
Hart, Vi. Doodling in Math: Sick Number Games [Video file]. 2010.
Khan, Ali. Spirograph [Processing program].
Weisstein, Eric. Wolfram MathWorld [Website].
Altes, Gijs Korthals. Paper Models of Polyhedra [Website].
Lockhart, Paul. Measurement. Cambridge: The Belknap Press of Harvard University Press, 2012 (Part 1, Chapter 1).
Nicolai, Carsten. Grid Index. Germany: Gestalten Verlag, 2009.