2x2 Matrix Operations Acting on a Unit Square
This Demonstration shows the images of various combinations of two 2×2 matrices and acting on a unit square.
 H. Dogan-Dunlap, "Linear Algebra Students' Modes of Reasoning: Geometric Representations," Linear Algebra and Its Applications, 432(8), 2010 pp. 2141–2159.
 H. Dogan, R. Carrizales, and P. Beaven, "Metonymy and Object Formation: Vector Space Theory," in Proceedings of the 35th Conference of the International Group for the Psychology of Mathematics Education (PME 2011), Ankara, Turkey (B. Ubuz, ed.), 2011 pp. 265–272.