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Celebrate Circumferences & Diameters on Pi Day!

Pi Day is observed on March 14 (3/14) since 3, 1, and 4 are the first three significant digits of π.  In mathematical terms, Pi (π) is the ratio of a circle's circumference to its diameter. Leverage our timely Pi Day resource collection to help students understand this unique geometry metric! 

Grades K-12

TeachersFirst's Pi Day Resources

Honor Pi Day and everything Pi through related projects and classroom activities. Whether you “circle around” Pi for one class or spend an entire unit on this very special number, find meaningful projects and conversation starters.

Grades 5-12

Celebrate Pi Day!

Simplify Pi with this collection of 9 video stories and accompanying activities, taken from NBC news stories. Each short video includes an opportunity to apply math concepts to real world situations, activity suggestions, plus a transcript to use.

Grades K-5

Math Art for Kids: Pi Skyline

Pi Skyline allows primary students and visual learners to combine math and art for Pi Day, plus a video with examples to follow. Try out the simple instructions to draw, cut, and graph your way to represent and simplify the digits of Pi.

Grades 7-12

Pi Day

Share the meaning of Pi with students through the short explanation at the Learn About Pi link and find Pi Day activities to try with your class: eating pie, contests for memorizing the most digits, Pi research ideas, and more (add your own ideas.)

Numbers: Curriculum Connections Beyond Math

Cross-pollinate all of your subject areas with our CurriConnect book list offering math connections. Find even more math discoveries that promote problem-solving and logical thinking PLUS determine how big a number really is! 

Grades K-12

CurriConnects Book List - Math in Use

Refine your math and cross-curricular lessons with this powerful booklist including mathematicians, architects, and engineers who have applied numbers to accomplish great things: historic feats, saving money, building major architecture, and more.

Grades 6-12

CanFigureIt Geometry

This interactive tool and workspace for exploring and learning about geometric proofs includes over 450 topics. The site was developed to help promote problem-solving skills and logical thinking and provides immediate feedback to student responses.

Grades 6-12

Is That A Big Number?

Promote numeracy understanding while developing number sense as you learn number facts about countries, ratios, or take a number quiz. Use the search bar to ask about any number; the results provide context and show the relationships to your query.

More Math to Explore!

Our curated math collection provides links to grade-based math content, challenging math problems, and an online algebra calculator for solving equations.

Grades K-12

TeachersFirst's Math Resources for All Grades

Math resources abound at this curated collection that includes 5 math content standards: Numbers & Operations, Algebra, Geometry, Data & Probability, and Measurement all based on NCTM standards and divided by grades K-2, 3-5, 6-8, and 9-12.

Grades K-12

Open Middle

Open Middle offers "Challenging math problems worth solving." Find challenging math problems for all grade levels plus multiple options for finding the solution. Use the filters to search by grade or topic, or search using Common Core standards.

Grades 5-12

MathPapa

Access helpful algebra lessons -- the first 5 of which are perfect for beginning Algebra students. The site also offers an online algebra calculator, which students (and you) can use to solve equations; it even displays each step in solving an equation!

This Week at TeachersFirst

Our virtual workshops continue this Tuesday at 7 pm ET and spotlight 5 Strategies for Building Content-Area Literacy. Stop by the Infusing Technology Blog to catch-up on some recent posts. And share your response in our weekly poll, which asks about how your school celebrates Pi Day.