I have worked in the field of education for over twenty-five years. Most of my time and energy has been dedicated to implementing interventions to help students who struggle to learn, and designing and evaluating interventions for those students.
During this period my greatest frustration was determining or demonstrating whether the intervention was making a positive meaningful difference. I traced the source of this frustration to one fact. It was very hard to find an easy to implement student assessment that could really answer the fundamental question; is what we are doing working?