Challenge your students to think like engineers—one clever puzzle at a time.This engaging STEM warm-up resource, Critical Thinking & Riddle Bell Ringers, invites middle school learners to jumpstart their brains with logic-based bell ringers designed to boost reasoning, problem-solving, and creative thinking. Perfect for building routine, sparking conversation, or transitioning into hands-on STEM projects, each bell ringer is paired with a clean, simple answer slide that encourages discussion an