@CNN: He wanted to help kids learn. Now, his startup serves 90% of classrooms. https://t.co/RUoKiDm9E2 https://t.co/nCRXA53Ndv

@CNN: He wanted to help kids learn. Now, his startup serves 90% of classrooms. https://t.co/RUoKiDm9E2 https://t.co/nCRXA53Ndv