Scaling up good corporate social investment practices in developing countries is crucial to realizing the "Education for All" and "Millennium Development Goals". Yet very few corporate social investments have the right mix of vision, financing, cross-sector engagement and leadership to come to scale. Globally, 67 million children are not enrolled in primary school, over 200 million are in school but not mastering basic skills such as reading, and many millions more complete post-primary education without the skills needed to participate in society or the local economy. Overcoming these challenges will require swift and bold action by many actors, including governments, multilateral organizations, donors and civil society. Corporations can use their core assets to generate shared value for business and society by helping get children into school, setting a strong learning agenda and scaling up what works in education. This policy paper looks at what works and what is not working in corporate efforts to further education in developing countries. (Contains 54 endnotes.)