Engage your students in a real-world introduction to Venn diagrams with this Pizza vs Burger class activity, designed using the Building Thinking Classrooms framework. This resource includes everything you need to run a full lesson using vertical whiteboards, thin-sliced problems, and a student-friendly story hook to help learners understand overlapping sets, intersections, unions, and complements. What’s Included:Lesson plan with a 10-minute teacher-led launch (hook + symbol introduction)Thin s