Finding the right framing is key. As an educator, Alejandro Rodríguez knows that even the most complex concepts can become approachable if you choose your communication method wisely. This post is ostensibly an introduction to confusion matrices and classification metrics, but it's also a masterclass on the power of a simple, well-chosen example. Data visualization is about making massive amounts of information accessible and interpretable. Its success depends on a series of design decisions, both small and big; Weronika Gawarska-Tywonek's excellent primer will help you understand how color palettes work, and how to go about choosing the one that's most appropriate for the task at hand.