Because of the substantial impact on outcomes for children, states and school districts across the country are addressing issues surrounding early learning opportunities and school readiness for young children. Full-day kindergarten plays an important role in both. Colorado has made significant investments in full-day kindergarten as a means of…

This paper describes a classroom teaching experiment, concerning the concept of probability, with children aged 5 in a kindergarten school. The teaching experiment was based on constructivist and interactionist theories about the learning of school mathematics and lasted one month. The collection of the information was based on the tape-recorded…