The role of assessment in science education is explored, focusing on summative assessment in British public certificate examinations. Examples of test items are presented to illustrate difficulties in making valid and reliable assessments, and issues with implications for formative assessment are discussed. (SLD)

Psychometric information was obtained on the Longeot test, which measures aspects of formal thinking, from a sample of 884 high school science students in India taking a Hindi version of the test. The test version appears valid for these students and may be used to classify subjects into Piagetian developmental levels. (SLD)

A hierarchical modeling approach is used in studying the predictive validity of the Kenya Certificate of Primary Education examination, a key aid in selecting students for secondary education. Results from 51 schools indicated a modest predictive validity for the examination, with school and student characteristics influencing results. (SLD)