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Adding + It Up: Helping Children Learn Mathematics
symbols. Other students who gave the same incorrect answer drew a diagram showing six students and one professor and seemed to think of S and P as units of measure rather than variables. They thought it just as sensible to write 6S=P as to write 12 in.=1 ft.
Rosnick and Clement, 1980.
Kaput and Sims-Knight, 1983.
Soloway, Lochhead, and Clement, 1982.
Sutherland and Rojano, 1993.
Kalchman, Moss, and Cass, 2001; Koedinger, Anderson, Hadley, and Mark, 1997.
For example, Davis and Pobjoy, 1995; Sutherland, Jinich, Mochón, Molyneux, and Rojano, 1996.
Koedinger, Anderson, Hadley, and Mark, 1997; Moreno, Rojano, Bonilla, and Perrusquia, 1999; Rojano, 1999.