Challenge your students with maths problems that don't have a single right answer. These Open Ended Math and Fermi Questions give Grades 2–6 students real-world estimation challenges that build critical thinking, problem-solving, and reasoning skills. Includes 20 investigation worksheets, 20 task cards, teacher slides, and reflection activities. Perfect for math extension, enrichment, or problem-solving lessons.

Students break down big questions into manageable steps, make estimations, and justify their reasoning — developing mathematical thinking that goes far beyond memorisation. With 20 worksheets, 20 task cards, and editable teacher slides, this pack gives you flexible, open-ended maths investigations ready for warm-ups, centers, or whole-class inquiry.

What Is a Fermi Question?

Fermi questions are open-ended math problems that require students to make estimations, justify reasoning, and break down complex scenarios into manageable steps. Named after physicist Enrico Fermi, these investigations focus on arriving at reasonable approximations—not exact answers—making them ideal for classrooms that value mathematical thinking over memorization.

⭐️ EXTEND YOUR STUDENTS ⭐️

KEY FEATURES

• Teacher Slides – Editable, ready-to-use slides to introduce each question and model the estimation process step-by-step.
• Open-Ended Maths Worksheets – 20 inquiry-based worksheets designed to spark discussion and help students apply estimation, multiplication, division, and place value reasoning.
• Investigation Task Cards – 20 flexible task cards perfect for rotations, centers, early finishers, or extension activities.
• Reflection Activities – Prompts that encourage students to evaluate their strategies, explain their thinking, and refine their approach.
• Structured Reporting Page – A reusable format to help students record their estimations, working out, and conclusions.
• Perfect for Grades 2–6 – Open-ended enough to suit a wide range of math abilities and support extension, enrichment, or whole-class problem-solving.

⭐️ PERFECT FOR 2nd to 6th GRADE ⭐️

Why Use Open-Ended Maths Investigations?

• Promotes Mathematical Reasoning – Moves beyond rote calculations to focus on logical thinking and estimation strategies.
• Supports Real-World Application – Questions are grounded in relatable, everyday scenarios that make math meaningful.
• Builds Confidence – There’s no single correct answer—students explore possibilities and learn through approximation.
• Encourages Collaboration – Great for group work, class discussions, and inquiry-based learning.
• Flexible Use – Integrates into math warm-ups, problem-solving lessons, enrichment time, or inquiry units.

Give your students the opportunity to tackle meaningful, open-ended problems that develop their mathematical thinking and spark curiosity. Download this open-ended maths investigation pack today and bring the power of estimation and inquiry to your classroom!