Codium is a web app that aims to further online codejumacation™ by making it easier for mentors and teachers to collaborate with their students. Teachers can host a class using Codium and invite their students to attend the class. When class starts, the teacher starts to stream video and teach the class, while the students code along. If the students encounter a problem, they can let the teacher know, and the teacher can collaborate with the student via their in-browser IDE (much like a shared google doc). Students can compile code directly from the browser.