“…Many of the participants in that study (37%) failed to construct the correct algebraic equation (6P = S), and their most common error was a reversal of the two variables (6S = P). Over the years, these and other researchers have reported similar findings, with error rates ranging between 40 and 60% (Bernardo & Okagaki, 1994;Clement, 1982;Clement, Lochhead, & Monk, 1981;Fisher, 1988;Graf, Bassok, Hunt, & Minstrell, 2004;Kaput & Sims-Knight, 1983;Martin & Bassok, 2005;Rosnick, 1981;Rosnick & Clement, 1980;Wollman, 1983).…”