The purpose of the Girls' Education Challenge (GEC) is to help up to a million of the world’s poorest girls improve their lives through education and find better ways of getting girls in school and ensuring they receive a quality of education to transform their future. RTI International is part of the Evaluation Manager, led by Coffey International. In this role, RTI is responsible for developing and conducting the learning assessments associated with the evaluation for quality assurance on sampling frameworks and for providing the design of a longitudinal study. The purpose of this study is to establish the impact of the education of marginalized girls on a range of economic, social, health, and societal outcomes.