Don’t call Africa a charity case. In recent years, it’s become a testing ground for breakthrough ideas, innovative high-tech products, and disruptive startups. As the world’s fastest-growing mobile phone market, it’s no wonder so many multinationals, entrepreneurs, and educators are looking to tap the continent’s potential, one of the world’s youngest and most tech-savvy cultures. You can glimpse the future in certain parts of Africa where children are learning to read on tablet computers, where super-cheap solar power is lighting off-the-grid rural communities, and where more than 55 million Africans use their mobile phones to settle debts, take out insurance policies, and collect payment. Here are some of the leapfrog technologies pushing change.