What is a prime number? A number is prime when it is only divisible by 1 and itself. Help your little mathematician recognize prime numbers.

Use this glossary with the EL Support Lesson: Factor Friend or Foe?

Use this glossary with the EL Support Lesson: The Factor Tree Strategy.

Use this glossary with the EL Support Lesson: Multiples and Skip Counting.

Use these vocabulary cards with the EL Support Lesson: Factor Friend or Foe?

Use these vocabulary cards with the EL Support Lesson: The Factor Tree Strategy.

Use these vocabulary cards with the EL Support Lesson: Multiples and Skip Counting.

Use these vocabulary cards with the EL Support Lesson: Conversations About Prime and Composite Numbers.

Figure out factors with the help of this fun worksheet!

Here's a way for your third grader to practice finding multiples of two.

Become the prime expert of prime numbers with this engaging maze!

Give your child prime number practice with this simple worksheet.

Students practice solving a variety of equations, then determine if the answer is a prime number.

Give students practice identifying prime numbers with this fun this maze activity!

Practice identifying factors with this beach-themed worksheet for fourth graders!

List factor pairs with this bright fourth-grade math worksheet!

Practice identifying prime and composite numbers with this focused worksheet!

What treasure will you find at the end of these rainbows? Factor pairs, of course!

It’s time to find the prime numbers in this investigative math worksheet!

It’s time to find the prime numbers in this investigative worksheet!

Learn to identify prime and composite numbers in this guided worksheet!

From multi-digit subtraction to identifying prime numbers, assess each student’s mastery of a variety of fourth-grade math skills.