Bring the principles of a Thinking Classroom to life with these 16 challenge questions! Each prompt is carefully crafted to encourage students to stand, collaborate, and think deeply. Inspired by Peter Liljedahl’s research, the early challenges are engaging, non‑curricular puzzles that hook learners and build confidence. As students become comfortable working together, the later questions align with curriculum and gradually increase in complexity, encouraging learners to think for longer periods and develop persistence. The tasks are open‑ended and support multiple strategies, so every student has a way to contribute.