1. Althouse, R. (1994).Investigating mathematics with young children. New York: Teachers College Press.
2. Barbour, N., & Seefeldt, C. (1993).Developmental continuity across preschool and primary grades. Wheaton, MD: ACEI.
3. Bredekamp, S. (1989).Developmentally appropriate practice in early childhood programs serving children from birth through age 8. Washington, DC: National Association for the Education of Young Children.
4. Charbonneau, M., & Reider, B. (1995).The integrated elementary classroom. Boston: Allyn & Bacon.
5. Handbook of research on mathematics teaching and learning. (1993). New York: Macmillan.