Getting reliable evidence
This chapter explains how to identify reliable evidence ‘assessment for learning’ and describes the main sources of evidence. It presents the combined list of effective methods from those sources. People who study evidence (to decide what is reliable), point out that, for non-research experts, it can be confusing to read individual research papers because: individual research papers can sometimes be contradictory and it is difficult to work out the quality of the research. ‘Effect-size’ is a commonly used measure used in research to compare the results of different experiments on the same scale. A good knowledge of the evidence empowers the individual teacher and gives them autonomy and the opportunity to say ‘no’ when asked to carry out a counter-evidence task.