Love this anchor chart for prime and composite numbers!
Here's a graphic organizer to help students learn the procedure for prime factorization.
Prime Factorization Graphic Organizer
Here's a FABULOUS idea for making prime factorization trees.
pinkmathematics: Important factors
Here's a great idea for creating prime factorization monsters.
3 methods to find GCF reference sheet
Here's a foldable for how to find the GCF using T-charts.
This fast-paced (and free) game is a great way to for kids to explore with the concept of factors, allowing you to address the Common Core Math Standards within the Grade 4 cluster "Gain familiarity with factors and multiples." Students will quickly discover the difference between prime and composite numbers, as well as realize the fact that 1 is a factor of every number.
Here's a game for kids to gain familiarity with factors and multiples.
Factor Flip prime & composite game
Here's an activity where students use a 100 board to find multiples and factors of numbers.
Here's a great graphic organizer to help students factor numbers 1 - 100. These can be used to teach prime/composite, odd/even, divisibility rules, skip counting, compatible numbers, factors, multiplies, GCF, simplifying fractions, and more. Link to free download included.
If My Calculations Are Correct...
Interactive Bulletin Boards
Math Manipulatives - Find the prime factorization of numbers by completing factor trees. Then use a venn diagram to sort the prime factors. Multiply numbers in the intersection to find the greatest common factor. Multiply all of the numbers in the venn diagram to find the least common multiple.
Factor Trees and Prime Factorization
Use a T-chart for students to compile factors.
Slice composite numbers into prime numbers.