有理数の学習

• Sowder, J. T. & Schappelle, B. P. (Eds.). (1995). Providing a foundation for teaching mathematics in the middle grades. New York, NY: SUNY Press.
  
• Capenter, T. P., Fennema, E., & Romberg, T. A. (Eds.). (1993). Rational numbers: An integration of research. Hillsdale, NJ: Lawrence Erlbaum Associates.
  
• Hunting, R. P. & Davis, G. (Eds.). (1991). Early fraction learning. New York, NY: Springer-Verlag.
  
• Streefland, L. (1991). Fractions in realistic mathematics education: A paradigm of developing research. Dordrecht: Kluwer Academic Publishers.