Using data collected from two multiyear teacher professional development projects employing randomized control trials, this study describes the development and validation of a paper-based test of elementary teachers' science content knowledge (SCK). Evidence of construct validity is presented, including evidence on internal structural…

Though addressing sources of uncertainty is an important part of doing science, it has largely been neglected in assessing students' scientific argumentation. In this study, we initially defined a scientific argumentation construct in four structural elements consisting of claim, justification, uncertainty qualifier, and uncertainty…

Explores variables influencing the cognitive emphasis of teachers' examinations. Examination questions from Nigerian secondary school science teachers were analyzed according to Bloom's Taxonomy. The influence of the following variables on levels of questions was investigated: teachers' educational backgrounds, subjects taught, grade level taught,…