This article is a report of the impact assessment of two outreach programs to primary schools run by the Botswana National Museum. The oldest of the programs, Zebra-on-Wheels was officially launched in 1980 and has involved all the primary schools in the country at least twice. The study aimed to establish the impact of the two programs and make recommendations for possible improvements. Thirty-eight schools throughout Botswana participated in the study. Teachers in these schools were interviewed and classroom observation sessions were carried out. Teachers’ observations about the two programs
Constraints on learning, rather than being unique to evolutionarily privileged domains, may operate in nonprivileged domains as well. Understanding of the goals that strategies must meet seems to play an especially important role in these domains in constraining the strategies even before they use them. THe presente experiments showed that children can use their conceptual understanding to accurately evaluate strategies that they not only do not yet use but hat are more conceptually advanced than the strategies they do not use. In Experiment 1, 5-year-olds who did not yet use the min strategy