In the quarter-century since the first website was published, the internet has changed our lives. Amazon puts access to over 500 million products before us, Spotify lets us stream over 30 million songs and Facebook allows us to connect with over 2 billion people around the world. We know that the web has transformed the way we shop, consume media and socialize. But how much has the power of the online network changed education? In this article, we explore the impact of crowdsourcing on different modes of learning.