Fifth and sixth graders explore prime numbers. They work with a partner to build rectangular arrays using twelve tiles. Factor pairs are noted and recorded on graph paper. Pupils construct rectangular arrays with a prime number and...

Older elementary students will appreciate how clearly Sal explains how to find the prime factorization of 75. He shows the complete process, taking note of numbers that are, and are not primes, and why.

By offering a step-by-step explanation of how to identify prime numbers, this presentation would be a terrific way to give learners a visual example of prime numbers. This is a simple, and easy way, for students to understand the "why"...

Remembering which numbers are prime can be a snap if you have a graphic to help you out. As this printable 8x11 image will tell you, a prime is a number which can only be divided by one and itself. Number 1-100 are enclosed in pretty...

Identifying patterns is a crucial skill for all mathematicians, young and old. Explore the multiplication table with your class, using patterns and symmetry to teach about square numbers, prime numbers, and the commutative and identity...

A factor tree? What's a factor tree? A tree of factors? A factor tree is a method use to do the prime factorization of an integer. It's not complicated. Watch the teacher as she explains the steps and shows how to write the answer as a...

A very quick look at a multiplication table and how to eliminate numbers according to multiples of 2,3, 5, and 7. After eliminating these multiples, the numbers you are left with are prime.

Factoring is an important math skill, and it's often quite confusing for youngsters. This presentation does a good job of showing the basic skills and vocabulary needed to begin to understand this important process. Prime numbers,...

Finding factors is an integral aspect of multiplication. Although there are two examples here, they don't illustrate the process so you will still need to model this a few times for scholars. First, mathematicians list the factors for...

Prime and composite numbers are the focus of this mathematics lesson. In it, learners practice techniques for identifying these two types of numbers. They utilize the Inspiration program to complete a task that is clearly explained, and...

Learners examine the concept of finding the greatest common factor. They complete number of activities as they practice identifying prime and composite numbers. Pupils apply rules of divisibility and find the greatest common factor while...

Children determine if the 45 numbers listed are prime numbers or composite numbers. They check off their answers. A very good resource!

Learners examine and discuss prime numbers, composite numbers, and prime factorization. They develop and create a factor tree mobile using exponents.

For this applying the probability of numbers from one to fifty worksheet, students find divisors, prime numbers, composite numbers, and designated place value numbers. Students solve five problems.

In this factor trees worksheet, students make factor trees for 2 through 4 digit numbers. Students complete 20 factor trees for these numbers.

Using the numbers 225 and 270, the narrator explains how to find the greatest common factor and the least common multiple. This presentation could be used in conjunction with other videos in a series exploring how to identify prime...

Learners examine a Babylonian clay tablet and the mathematics found on it as a catalyst to investigate a variety of mathematical ideas. They work with prime numbers, classify numbers as whole, integer, rational, or irrational and use...

Explore prime numbers. Learners use an interactive 100's chart to identify prime numbers, discuss a glossary of terms, use cards to list multiples of 2,3,4,5, and play a bingo game.

Prime factorization and prime or natural numbers are the topics on display in this video. Sal shows viewers how to solve these problems, as well as a problem on expressions representing a given volume.

A stop action video demonstrating how 2,3, 5, 7, and 11 are prime numbers. There is no dialogue in the video so the class has to pay attention and be able to read to follow the video. I recommend playing the music on low volume so as not...

Prime numbers are very special numbers. This clip defines what a prime number is and then provides a song to help students remember what they are. This could be a very helpful teaching strategy for kinesthetic learners. Music builds memory.

Rushton explains prime and composite numbers by showing what numbers can be multiplied to get the numbers 1 - 11. He also explains that 0 and 1 are special numbers.

Master composite and prime numbers with this fast-moving game. Using your sword, slice those composite numbers and watch them break up into factors. Slice again if those factors are composite. However, watch out for prime numbers,...

Upper elementary and middles schoolers discuss and solve real world applications of math. They use formulas for volume and percents to answer real world questions. In the second part of the instructional activity, groups write and solve...