Pi Day is celebrated on the 14th of March (3.14) around the world. Now it is also International Day of Mathematics. That's a fact that the Pi is the iconic number of mathematics, so there are plenty of websites & blogs, and zillions of activities out there to celebrate this day.

Here are some of my favorite activities I have used with the Middle School and Elementary School Students;

Classroom Posters

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Fun Facts About Pi

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Calculating Pi Like Archimedes

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Pi Day


Can't Stop

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Iconic Number



UNESCO announced Pi-Day as the International Day of Mathematics in 2019.

"Greater global awareness of mathematical sciences is vital to addressing challenges in areas such as artificial intelligence, climate change, energy, and sustainable development, and to improving the quality of life in both the developed and the developing worlds."  

Do not forget to check out the International Day of Mathematics Page for the posters!

2020 - Mathematics is Everywhere.

(The first-ever International Day of Mathematics)

2021 - Mathematics for a Better World

2022 - Mathematics Unites.

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Pi TV 
Brilliant Pi Videos