This document provides an overview of effective altruism and how to evaluate charitable causes and opportunities. It introduces the Importance, Tractability, Neglectedness framework for analyzing causes. Key areas covered include deworming as an example, using Google Scholar to research causes, and comparative cost-effectiveness analyses in health and wealth. Natural experiments are discussed as a way to study interventions. The document concludes by emphasizing using evidence and the ITN framework to identify cost-effective giving opportunities.