Research & Development - Research Base of the Poverty Work The research base of aha!’s work on poverty pulls from several sources and disciplines. This work is an additive model that recognizes and values the assets of people from all economic classes. In addition, it identifies skills, theories of change, and ways of building schools where students achieve. Research Base of The Model – Major premises of the Payne School Model Additive Model – aha! Process’s Approach to Building High Achieving Schools