Celebrating International Maths Day: making the most of Pi Day on 14 March 2026

This year Pi Day falls on a Saturday but that’s no reason for it not to be celebrated in school, either the week before or week after!

International Maths Day—more commonly known as Pi Day—offers a brilliant opportunity for schools to celebrate the power, creativity, and everyday relevance of mathematics. For teachers and school staff, it’s the perfect moment to engage students in hands-on learning, spark problem‑solving conversations, and highlight how maths underpins so much of what they encounter both inside and outside the classroom.

Why Pi Day?

Pi Day falls on 14 March because the date, written numerically in the US as 3/14, reflects the first three digits of π (3.14), the famous mathematical constant, discovered in 250 BC by Archimedes, representing the ratio of a circle’s circumference to its diameter.

Whether students are just beginning to recognise shapes or tackling complex geometry, π provides a vital foundation for understanding the world in mathematical terms.

Beyond its numerical importance, Pi Day gives schools the chance to celebrate maths as a subject that encourages creativity, resilience, and curiosity—qualities that are essential not only academically but in lifelong learning.

Using School Planners to Explore π in the Classroom

Many students already carry a valuable maths resource with them every day—the reference pages in their school planners. These pages include essential formulas involving π, supporting learning across Key Stages.

The planner’s maths section includes clear, student‑friendly formulas for calculating:

Area of a Circle:
A = πr², helping pupils explore curved shapes, scale and spatial reasoning.
Volume of a Cylinder:
V = πr²h, showing how circles extend into 3D space—ideal for linking geometry to real‑world objects like cans, tubes and pipes.
Volume of a Cone:
V = (1/3)πr²h, giving learners insight into how shapes change when tapering or narrowing, while strengthening formula‑substitution and problem‑solving skills.

Pi Day is a great opportunity to direct students to these planner pages, encouraging independent learning and helping them understand how mathematics is both accessible and relevant. These tools support learners in applying formulas, checking their understanding, and building confidence when working with π.

Creative Ways to Celebrate Pi Day in Your School

Circle‑Themed Treasure Hunts
Ask pupils to use the formulas from their planners to measure objects around the school. From circular tables to clock faces, learners can calculate circumference, area, or volume, turning the school grounds into a hands‑on geometry lab.
Pi‑themed Assembly or Tutor Activities
Share fascinating facts about π, its history, and its appearance in nature, architecture, design, and technology. Encourage students to bring examples from home or spot circular shapes in the school environment.
Pi Recitation Challenge
Invite learners to memorise and recite as many digits of π as they can—a fun, competitive activity that can energise the whole school community.
Cross‑Curricular Opportunities

Art: Explore patterns made from circles, spirals, or rotations.
Design & Technology: Investigate cylinders and cones in product design.
Science: Connect circular motion, waves, or planetary orbits to π.

Planner‑Based Worksheets
Create quick starter tasks or extension activities directly referencing the maths formulas in the planners. This reinforces good study habits and helps students make the most of the learning tools they already have.

Celebrate the Beauty of Maths

International Maths Day is more than a date—it’s a celebration of problem‑solving, critical thinking, and the joy of discovery. By using the planner’s maths reference pages and engaging students in π‑focused activities, schools can turn 14 March 2026 into a time that strengthens confidence, curiosity, and connection across the curriculum.

Secondary Academic Planners

Primary Planners