Problem Banks

Andrew Stadel 3-Act Math Tasks

“I'm a Philosophy major and musician that fell into teaching. I've been a classroom teacher since 2004, exploring middle school math: Pre-Algebra, Algebra, & Geometry.

Teaching is a craft.

To nourish that craft, professional development is essential. To those teachers who create, inspire, and share; THANK YOU. May we continue to learn from you in order to better explore math with our own students. Hit me up on Twitter with any Q's.

In the context of learning, if you're not having fun, your students aren't having fun.

Therefore, have fun!”


Caribou Contests

The Caribou Mathematics Competition is a world wide online contest that is held six times throughout the school year. Each of these days, five contests are offered, one for each of the grade levels 3/4, 5/6, 7/8, 9/10 and 11/12 and each one in English, French and Persian.

The Caribou Cup is the series of all Caribou Contests in one school year. Each student's ranking in the Caribou Cup is determined by their performance in their best 5 of 6 contests through the school year.


Estimation 180

“Each day of the school year I present my students with an estimation challenge. I love helping students improve both their number sense and problem solving skills. I'd like to share the estimation challenges with you and your students. Michael Fenton and I have collaborated on this handout for your students. Happy Estimating!

Enjoy, Andrew Stadel”


G Fletchy

Graham Fletcher has worked in education for over ten years as a classroom teacher, math coach, and currently as a district math specialist.

He graduated from the University of Georgia where he earned his specialist degree in Math Education. Graham’s passion for conceptual understanding through problem-based lessons has led him to present internationally and throughout the United States.

He continues to be an advocate for best practice and a change agent for elementary mathematics.


Inside Mathematics

The Problems of the Month are organized by grade level and main topic for that level. These grade‐level expectations are just estimates and should not be used as an absolute minimum expectation or maximum limitation for students. The structure of a Problem of the Month is a shallow floor and a high ceiling, so that all students can productively engage, struggle, and persevere.


Math for Love

This website features a free lesson library that can be filtered. Their blog is a great for prompting educators to think about math education.


National Council of Teachers of Mathematics

Requires paid membership.


New Jersey Assessment of Skills and Knowledge

The mathematics section of the NJ ASK measures a student’s ability to solve problems by applying mathematical concepts. The areas tested are: Number and Numerical Operations; Geometry and Measurement; Patterns and Algebra; and Data Analysis, Probability, and Discrete Mathematics. The mathematics section of the test consists of multiple-choice and open-ended questions.


Parallel and Open Questions Grades K-3

Parallel and open-ended questions for Early Years to Grade 3.


Sam Shah

Secondary tasks for Geometry, Algebra, Pre-Calculus and Calculus.


Sorting and Classifying

“A variety of interactive Carroll and Venn diagrams which are used to sort shapes and numbers according to their properties.”


Tap into Teen Minds

Kyle Pearce is the K-12 Mathematics Consultant with the Greater Essex County District School Board, where he enjoys uncovering creative ways to spark curiosity through the inquiry process using tasks that are contextual, visual and concrete. He enjoys sharing his most recent learning in mathematics pedagogy and effective uses of technology by delivering workshops both near and far.


University of Waterloo (English and French)

The Problem of the Week is designed to provide students with an ongoing opportunity to solve mathematical problems. Each week, problems from various areas of mathematics will be posted here and e-mailed to teachers for use with their students from grades 3 and up.


Would You Rather?

John Stevens is an educational technology coach for Chaffey Joint Union High School District who has also taught high school Geometry, Algebra 1, middle school Math, Service Learning, and Robotics, Engineering, and Design since 2006. He has served as the go-to guy for trying new, crazy, and often untested ideas to see how well they will work.

He co-founded and moderates #CAedchat, the weekly teacher Twitter chat for the state of California. He also is the co-founder and organizer of EdCamp Palm Springs, the first in the area. He is the co-author of The Classroom Chef, a book designed to help teachers take risks in their classrooms and encourage them to prepare a lesson like a fine meal. During recent summers, John has had the honor of presenting at CUE Rockstar events in California and various technology and math conferences. John blogs at His latest adventure has led him into the world of 3D-printing, designing lesson plans and curricula AirWolf3D. Follow him @jstevens009 or email him at


Yummy Math

“We've created Yummy Math to provide teachers with an easy way to bring real-life into their math classrooms. It is our belief that when math is explored in contexts that are familiar and of interest to students, students will be more engaged to do math, reason, think critically, question and communicate. Our activities are written to correspond with the NCTM Process Standards and the CCSS Standards for Mathematical Practice.”



Looking for a fun way to explore a math concept in the classroom or provide a family engagement event at your school? Or maybe just a great way to keep math front and center all summer long?

We have just the thing for you! Whether you are a teacher, administrator, or out of school care provider looking for unique ways to engage kids and families in your school or organization, or a parent looking for ways to get the whole family playing math, we've got you covered:

Activity Bank - Search our archive of math activities by subject, grade level, common core standard, and more to find just the right activity! All of our activities were created by our experienced programs staff to teach math concepts in engaging and memorable ways. Visit the Toolbox to explore the collection!

Resources for Schools - Everything you need to host your own Math Club, Family Math Night, or Monthly Math Challenge! All found in our Resource Library.