This paper proposes a comprehensive and scalable infrastructure model to guide Corporate Social Responsibility (CSR) efforts in delivering digital education to underserved school systems. Moving beyond traditional philanthropic approaches, the model is grounded in systems thinking, stakeholder theory, and digital inclusion frameworks to address the multifaceted challenges of educational inequality. It emphasizes modular technology deployment, institutional capacity building, and strategic partnerships between corporations, governments, NGOs, and local communities. Key components of the model include the provision of internet connectivity, hardware, and adaptive learning platforms; collaborative governance and accountability structures; and dynamic feedback mechanisms for continuous improvement. The model also introduces innovative funding strategies, including blended finance and shared value frameworks, to ensure long-term viability and alignment with corporate strategy. By integrating ethical design, measurement tools, and community participation, the framework creates a replicable pathway for impactful and sustainable digital CSR in education. The study concludes with practical implications for policymakers and corporate leaders and offers future pathways for enhancing inclusivity through emerging technologies and participatory governance. Ultimately, the model redefines CSR as a strategic lever for equity, innovation, and global educational transformation.