Guess Who

Amp up multiple fluency as well as build a strong foundation for common factors with this Napier's Bones activity. Students must consider questions that will have the most impact while building familiarity with their own rod as they try to be the first to identify their partner's bone.

Who Did It?

A problem solving bonanza! Build serious logic skills while improving understanding of multi-digit multiplication using Napier's Bones. Players build a suspect list and narrow down the options with each new clue focusing on products and what must be true to obtain a value. Can they determine Who Did It?

Spoons

Have a blast multiplying with this fast-paced "card" game. Players attempt to reach a target number by passing and discarding. Using problem-solving skills they consider what rods they should be on the lookout for to reach their goal. This game supports a deeper understanding of factoring, common multiplies, and algorithmic thinking.

Playing with Blocks

Introduce students to factoring with this easy to understand visual representation. As students work to create rectangles with a specified number of blocks, they find all the factors of a given value.

Block Target

This digital game introduces students to the concept of factoring in a very approachable and understandable way as they work to create rectangles containing the target number of blocks.

How Do You Know?

Introduce students to the term "factor" through relatable activities as they begin to consider how they might be sure they have found all the factors of a number.

Count This

In this short activity, students authentically develop an understanding of the importance of systematic exploration in order to ensure completeness.

Factor It

In this activity students first encounter factoring a given number - the hard way. By allowing students to self-discover a "better way" we are building confidence, engagement, and creative thinking strategies.

Remember This?

In Factor It! students found all the factors of a given value in a tedious but systematic way. Now, we spiral back to the commutative property to allow students to determine an easier and more condensed method to find the factors of a value.

Red Light, Green Light

Practice factoring in this light-hearted ticketing game helping students to identify when all factors have been found.

Factor Climb

In this interactive game, students practice factoring in a safe and engaging space as they attempt to identify enough factors to help the mountain climber descend the mountain.

The Taxman

Learn about taxes while amping up your factoring skills in this problem-solving game. Can you make more than you must pay the taxman?

Substitution

Substitution is one of the most powerful tools of a mathematician. In this activity, students develop an intuitive understanding of substitution as they engage in role-playing at a sandwich shop to help lay the foundation for prime factorization.

Ninety

How can students factor without division? In this lesson we discover how to find tricky products and missing values using only our multiplication table. Not only will this activity help students with factoring, but it also will build their understanding of multiplication, substitution, and strengthen creative thinking.

Fives

A perfect introduction to prime factoring, students explore strategies for multi-digit products with a factor of 5 and find easier ways to compute. But not everything works out nicely! Some numbers seem to cause problems. . . help your students to problem-solve and determine why.

Does It Matter?

In this activity, we get students thinking and warmed up to The Fundamental Theorem of Arithmetic or in other words, all factorizations of a number are equivalent and thus while there are many paths, all roads lead to the same result.

The Story of Eratosthenes

In this fun tongue-and-cheek story, we introduce Eratosthenes and his idea to create a sieve to help him identify prime numbers. This is a great way to introduce the idea of a sieve.

The Sieve

In this beautiful interactive applet, students explore the sieve of Eratosthenes to identify prime numbers.

My Sieve Quilt

Create your own prime sieve! Select colors for each prime and its multiples and watch as they blend, every creation unique. Export a picture for a fun prime wall display.

Prime Pop

How good are you at identifying prime numbers? In this fun digital activity, players pop the primes for unpredictable bonus points and achievements.