A case study of how teachers can improve the validity and reliability of assessment
Tom Johns, Associate Assistant Headteacher - Assessment and Reporting, Kingsmead School, Somerset, UK
After completing the ‘Assessment Essentials’ course from Evidence Based Education as part of my role, which leads on assessment and reporting, I wanted to deliver inset on making our school’s summative assessments stronger. The objective was to build capacity within staff to change their attitudes towards their approach to assessment and to make sure that all assessment had a purpose (what inferences do you want to make?) and that all staff were aware of how to improve the reliability (if students did the paper again, would the outcomes be the same?) and validity of assessment (how and when was the paper constructed? How is it marked?). This case study will look at how this was approached, what lessons have been learnt and how they could be embedded in other schools. Since Black and Wiliam (1
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