How teachers and students deal with assessment practices is largely influenced by the conceptions they hold about the purpose of assessment. This means that, given the current plea for a paradigm shift from Assessment "of" Learning to Assessment "for" Leaning with a balance between the formative and summative purposes of…

Formative evaluation of a physics curriculum unit (PLON) is reported. Phase one used general ideas and many instruments; phase two focused on specific questions arising from phase one. Findings suggested that relating curriculum content to ability to think about and explain a task was a prerequisite for student satisfaction. (CP)