A new undergraduate course has just been created at Princeton, called "Networks: Friends, Money, and Bytes". It talks about technology, social, and economic networks, and attracts students from engineering, science, and economics departments. The course content cuts across the boundaries of different types of networks without losing domain-specific functionalities. The course's pedagogical approach follows "Just In Time": orienting the entire course around 20 Questions about networked life and only introduces the mathematical languages as needed for each of the questions. I'll discuss what I learned through teaching this course and implications to networking research and curriculum development.