This QuickTime movie provides an opportunity to identify factors and with that information identify prime numbers. As you watch and listen to the teacher and student interact it helps clarify the thinking behind applying this concept.

This QuickTime movie continues using a hundreds chart to record all the prime numbers between 1 and 100 by eliminating all the composite numbers. As you watch and listen to the teacher and students interact it helps clarify the thinking...

This QuickTime movie uses a hundreds chart to record all the prime numbers between 1 and 100 by eliminating all the composite numbers. A pdf worksheet is available by clicking on the hyperlink at the bottom of the page. As you watch and...

This QuickTime movie provides an explanation of just what prime numbers are using graphics. As you watch and listen to the teacher and students interact it helps clarify the thinking behind applying this concept.

Gain a basic understanding of prime factorization by watching this easy to understand video tutorial. Additional resources are available as part of a paid subscription service. [6:40]

Prime numbers are numbers that have only 2 factors: 1 and themselves. For example, the first 5 prime numbers are 2, 3, 5, 7, and 11. By contrast, numbers with more than 2 factors are called composite numbers.

Can you recognize the prime numbers in this group of numbers? Which are prime, composite, or neither?

This video lesson demonstrates an attempt at an optimal trial division primality test that uses the Sieve of Eratosthenes. This video lesson from Khan Academy is intended for students who are taking an introductory computer science course.

This lesson grouping provides students with a wide variety of tricks and techniques to determine if one number is divisible by another number. It is 1 of 6 in the series titled "Divisibility."

This video introduces early, easy to remember, prime numbers. This lesson is 3 of 7 in the series titled "Early Primes."

This video introduces early, easy to remember, prime numbers. This lesson is 1 of 7 in the series titled "Early Primes."

This lesson will cover how to factor the coefficient separately from each variable in order to factor a monomial. It is 4 of 11 in the series titled "Factoring Monomials."

This lesson will go through the steps involved in using a ruler to measure length in centimeters and millimeters. It is 3 of 4 in the series titled "Millimeters & Centimeters."

This lesson will go through the steps involved in using a ruler to measure length in centimeters and millimeters. It is 4 of 4 in the series titled "Millimeters & Centimeters."

This lesson will go through the steps involved in using a ruler to measure length in centimeters and millimeters. It is 1 of 4 in the series titled "Millimeters & Centimeters."

This lesson will go through the steps involved in multiplying a two digit number by a 1 digit number. It is 3 of 4 in the series titled "Multiplying 2 Digit Numbers by 1 Digit Numbers."

This lesson will go through the steps involved in multiplying a two digit number by a 1 digit number. It is 4 of 4 in the series titled "Multiplying 2 Digit Numbers by 1 Digit Numbers."

This lesson will go through the steps involved in multiplying a two digit number by a 1 digit number. It is 1 of 4 in the series titled "Multiplying 2 Digit Numbers by 1 Digit Numbers."

This video discusses the fact that dividing by zero is impossible and so no numbers are divisible by zero. This lesson is 3 of 7 in the series titled "Zero and Divisibility."

This video discusses the fact that dividing by zero is impossible and so no numbers are divisible by zero. This lesson is 1 of 7 in the series titled "Zero and Divisibility."

This lesson answers the question: Is 0 a prime number? Students should know the definition of a prime number before watching this video. It is 2 of 6 in the series titled "Zero and Primality."

This video introduces early, easy to remember, prime numbers.

This lesson demonstrates the conversion of factorization to exponential notation.

This lesson [1:19] demonstrates the conversion of factorization to exponential notation. It is 8 of 10 in the series titled "Converting Factorization to Exponential Notation."