Africa has an education crisis – high-quality learning is often unavailable and beyond the financial means of many young people. Hardware and internet connection issues prevent these young people from accessing new forms of learning such as online education. Dot Learn solves these issues by encoding educational videos in file sizes that are 100x lighter than MP4 or web videos. With our proprietary file format, five hours of learning can be accessed online at the cost of sending a single text message. We are making online education work on cheap smartphones in Africa and have served 7000 students in Ghana and Nigeria since launch last October.