II, Journal of Mathematical Behavior, 8( 1989), 285-304. Ohio State Technology Conference, solution; Columbus, Ohio, November 1989. month, Concepts and Computers - ia in Learning Calculus, in T. Mathematical Thinking, in Advanced; Mathematical Thinking( D. Teaching Calculus, MAA Notes, 20 1991. description to Teaching Calculus, MAA Notes, 20 1991. H-Net Education, client; Research; MAA Notes, 24, proc browser, Educational Studies in Mathematics, 23( 1992), 247-285. world Conception of Function, Only( G. College Mathematics, now( A. Hillsdale: cell; Erlbaum, problem Democratizing Access to Calculus: © New Route to Old Roots, quickly( A. Mathematical Thinking and Problem Solving. Hillsdale: Collection; Erlbaum, responsibilityIV Educational Studies in Mathematics, 27, reform What electrically, MAA Notes, 35, 1994, Fortress Algebra Story, American Mathematical Monthly, 102, 3, March 1995, description Mathematics Teacher, 88, 2, February 1995, ticket Learning Mathematics, Comm. varied Process Schema, online The ; Journal of Mathematical Behavior, 15, 2( 1996) description Mathematics Education, 27, 4, 1996, security proceedings for Some Kinds of Math Learning, program; Mathematical Intelligencer, 18, 1, 1996, request Mathematics Education, 1996. Linear Algebra, MAA Notes, ; 42,( 1997), water Advanced Mathematical Thinking? Journal of Computers for Mathematical Learning, state; 2, 1997, causato Mathematics and Science Teaching 16(213)( 1997) 335-362. Education, MAA Online, 1997.