As we continue to learn about and attempt to implement formative assessment in science I am always on the lookout for good resources for use in professional development or individual learning. The following report is not science-specific but is FREE and lays a nice foundation for thinking about formative assessment as a PROCESS versus formative assessment as a particular instrument.
The Council of Chief State School Officers (CCSSO) report titled Formative Assessment and Next-Generation Assessment Systems: Are We Losing an Opportunity? by Margaret Heritage is definitely a worthy addition to your formative assessment collection. Download the pdf HERE.