Empirical Education Inc proposes to extend our analytical tool, MeasureResults¿, to include features that support school level experiments. MeasureResults allows practitioners to question the effectiveness of instructional and professional development products and to obtain answers using research and statistical techniques common in rigorous educational research such as described in Shadish, Cook Campbell (2002). By extending MeasureResults to support experiments in schools, we empower principals and their teams towards site based decision making.