Introducion / Richard Lesh and Marsha Landau
The acquisition of addition and subtraction concepts / Thomas P. Carpenter and James M. Moser
Proportional reasoning of early adolescents / Robert Karplus, Steven Pulos, and Elizabeth K. Stage
Rational-number concepts / Merlyn J. Behr ... et al.
Multiplicative structures / Gerard Vergnaud
Space and geometry / Alan J. Bishop
Van Hiele-based research / Alan Hoffer
Trends and issues in mathematical problem-solving research / Frank K. Lester, Jr.
Conceptual models and applied mathematical problem-solving research / Richard Lesh, Marsha Landau, and Eric Hamilton
Episodes and executive decisions in mathematical problem-solving / Alan H. Schoenfeld.