Computational and algorithmic systems are now embedded in all parts of society, which introduces both great opportunities and challenges. This course presents an introduction to computational social science, a rapidly growing interdisciplinary field that studies questions at the intersection of AI, data, and society. We focus on the spectrum of methodologies now available for conducting social research in the digital age, from large-scale observational studies to online experimentation, as well as research skills including reading state-of-the-art papers, writing reviews, and doing a research project. Topics covered will include online misinformation, algorithmic bias, and social media platforms.