Background: Uncertainty is a crucial element of scientific knowledge growth. Students should have some understanding of how science knowledge is developed and why scientific conclusions are considered more or less certain than others. A component of the nature of science, it is considered an important aspect of science education and allows…

The purposes of this study were to (1) investigate 127 high school students' views about scientific inquiry at different grade levels, and (2) to describe factors such as the teacher's views about scientific inquiry, his teaching, and his curriculum that facilitated or constrained students' views about scientific inquiry. The majority of students…

In 2 studies, an expectancy-value framework was applied to investigate effort expended on mathematics homework. In Study 1 (2,712 students in grades 5, 7, and 9; mean age=13.37 years), lower homework effort was found in higher grades. The effects of intrinsic value on homework effort were higher in the older cohorts, whereas the effects of the…