Think you can be one of the 25 best developers in ed tech? The Gates Foundation and Facebook are teaming up to host an education-centered hackathon bringing together ed tech enthusiasts, education experts, and the world’s best developers. Spend a day at Facebook’s headquarters in Menlo Park building Facebook apps for college-going, social learning, and out-of-school study on the world’s largest social networking platform. The best app in each category (college knowledge, social learning, out-of-school learning) will win $5,000. More info here.