• Classroom Resource Monthly Featured Resources Archive


    NCTM offers a featured resource in your grade band each month to help you make the most of your NCTM membership. 


    July 2020

    Elementary (K-5)

    Concentration (Pre K-2)
    Individually or against a friend, students match whole numbers, shapes, fractions, or multiplication facts to equivalent representations.

    Eating Grapes (3-5)
    In this problem, students will discover a rule for a pattern. Student may use examples until they are able to generalize to any case.

    Middle School (6-8)

    Finding the Balance
    Using tools that can be found around the home, students construct a two-pan balance and discover relationships between the length of the arm of a fulcrum and the mass of objects.

    High School (9-12)

    Growth Rate              
    Use height vs. age charts to approximate rates of change at single points on a non-linear graph.

    June 2020

    Elementary (K-5)

    See it, Move it, Grasp it: Math with Virtual Manipulatives (Pre K-2)
    Children create and describe designs using various pattern blocks. This is an open ended task that is fun for all ages!

    Odds and Evens (3-5)
    Students investigate fairness given a friendly game with spinners. Teachers can connect the idea of fairness to justice in the real world.

    Middle School (6-8)

    Pinwheel
    By constructing a model of an octagon that transforms into a pinwheel, students realize that many interesting geometric shapes occur that can be explored. Print or replicate the materials for this activty, or try using virtual manipulatives! 

    High School (9-12)

    Changing Places              
    Moving one chip at a time, and alternating colors, challenge your students to exchange the red chips for the blue chips in only 22 moves.

    May 2020

    Elementary (K-5)

    Pattern Block Designs

    If you wanted to build this design out of totally different blocks, what pattern blocks could you use?

    Pattern Block Fractions

    Can you find another way to use fraction pattern blocks and combine them to make one whole?

    Middle School (6-8) 

    Paving Stones

    In Paving Stones students are asked to find students are asked to find how many stones Kathy needed to buy to pave an area in her yard.

    High School (9-12) 

    The Rolling Triangle

    Equilateral triangle ABC is sitting on the top of square DEFG so that AC is coincident with DE. The triangle and square both have edges one unit in length.

    April 2020

    Elementary (K-5)

    Sum Search

    Children focus on finding sums while practicing the secondary skills of subitizing and explaining their thinking. Grab some dominoes and a hundreds chart to get started! 

    Darlene's Dart Board

    Can your students hit the target? Students will apply reasoning to find combinations of targets that total exactly 100 points. 

    Middle School (6-8) 

    A Day at the Fairs

    The problem this week is an old one, in fact over 500 years old. It goes back to the days in Europe when fairs were common in many cities, and merchants would travel from city to city, selling their various goods and buying other items they desired. A merchant went selling and buying at three city fairs. Did he make a profit or take a loss? 

    High School (9-12) 

    Four Men and Some Money

    This short but sweet Problem of the Week asks students to use algebraic reasoning to divide $100 among four people.

    March 2020

    Elementary (K-5)

    Counting on and Counting Back

    Help your students visualize the idea of "one more" and "one less" with this interactive lesson. All you need is a counting book and some counting cubes to get started!

    March Madness

    Students evaluate clues to arrive at correct outcome of game: scores of two teams.

    Middle School (6-8) 

    The Factor Game

    Students will love The Factor Game! It engages students in a friendly contest in which winning strategies involve distinguishing between numbers with many factors and numbers with few factors. Students are then guided through an analysis of game strategies and introduced to the definitions of prime and composite numbers.

    High School (9-12) 

    The 100 Block Walk for Math

    To celebrate the 100th Mathematical Lens column, Ron Lancaster and Bridget Bentele walked 100 blocks through Manhattan, photographing and documenting the mathematics they encountered along the way.

    February 2020

    Elementary (K-5)

    A Picture is Worth 100 Math Ideas

    Get ready to celebrate 100 with this technology infused mathematics activity. Students take the lead and photograph objects of varying amounts, increasing their understanding of place value and precision of language along the way.

    Building Bouquets

    This task asks students to apply the knowledge of divisors, dividends and remainders to solve a real world task. Students must form questions that will allow them to solve through productive struggle.

    Middle School (6-8) 

    If You Like Popcorn, Which One Would You Buy?

    This is a great math game for probability! Students love playing this game. You can have great discussions with students about whether or not they want to keep playing or bow out.

    High School (9-12) 

    All Around the World

    This 100-themed Problem of the Week leads to a result that may surprise you and your students.

    January 2020

    Elementary (K-5)

    Counting Back and Counting On

    The Concrete, Representational, and abstract intersect in this hands-on lesson while also integrating literature and musical connections.

    Every Breath You Take

    Students estimate the number of breaths they take, then perform an experiment to find the actual amounts.

    Middle School (6-8)

    The Game of SKUNK

    This is a great math game for probability! Students love playing this game. You can have great discussions with students about whether or not they want to keep playing or bow out.

    High School (9-12)

    Axonometry: Applying Complex Numbers to Art

    Axonometry is an Illumination that has students discover relationships between complex numbers and graphing. Students make connections between algebraic and graphical representations of a complex number.