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Love this anchor chart for prime and composite numbers!

Here's a graphic organizer to help students learn the procedure for prime factorization.

Here's a FABULOUS idea for making prime factorization trees.

pinkmathematics: Important factors

pinkmathematics.blogspot.fr

Here's a great idea for creating prime factorization monsters.

Here's a nice reference sheet outlining 3 different ways to find GCF.

3 methods to find GCF reference sheet

teacherspayteachers.com

Here's a foldable for how to find the GCF using T-charts.

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...

ifmycalculationsarecorrect.blogspot.com

Interactive Bulletin Boards - Factoring

Interactive Bulletin Boards

faculty.kutztown.edu

Young Teacher Love: Alternative assessment for a quick check: Factors and Multiples

Young Teacher Love: Factors and Multiples

youngteacherlove.blogspot.com

MissMathDork: middle school math made FUN!: The incredible Lapbook resource

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.

Blog post about making factors understandable AND fun with a cool game.

Factors and multiples quick check idea! Great for formative assessments!

Young Teacher Love: Factors and Multiples

youngteacherlove.blogspot.com

Use a T-chart for students to compile factors.

GCF and LCM factors anchor chart

Anchor chart to scaffold FACTORS. Math Grade 4. Factor Ninja.

factors & multiples mini book