Students explored variation and expectation in a probability activity at the end of the first year of a 3-year longitudinal study across grades 4-6. The activity involved experiments in tossing coins both manually and with simulation using the graphing software, "TinkerPlots." Initial responses indicated that the students were aware of…

A series of 13 survey questions based on a 50-50 spinner is used to explore school students' understanding of statistical variation in a chance setting. Five questions set the context by assessing understanding of theoretical expectation and representation of repeated trials in a stacked dot (line) plot. Four questions provide opportunity to…

Four Australian cohorts (born in 1961, 1965, 1970 and 1975) were studied between 1980-2000. The life transitions study focused on these three traditional markers of adulthood: (1) moving out of the parental home; (2) establishing an intimate relationship; and (3) buying a home. Incidence of these transitions was analyzed in terms of their…