Topmarks Online
Topmarks: Multiples and Factors
A multiple-choice game with two game modes. In the first, you need to identify the Lowest Common Multiple and in the second the Highest Common Factor. Questions increase in difficulty depending on accuracy.
University of Waterloo (Canada)
Wired Math: Primes and Prime Factors [Pdf]
Explore primes, prime factors, and composites using this collection of worksheets. Lots of detailed examples, interesting math facts, and colorful visuals. Acrobat Reader required.
George Mason University
Margo Mankus: Investigating Lcm and Gcf Using Rods
This lesson plan is for an activity using rods (Cuisenaire Bars) to help students understand the concept of factors, in particular the LCM and GCF of two numbers.
AAA Math
Aaa Math: Prime and Composite Numbers
This math tutorial offers an explanation of prime and composite numbers and lets students practice finding them.
Scholastic
Scholastic: Study Jams! Math: Multiplication and Division: Multiples
This site provides great practice on the concept of multiples. Students can first learn about the topic by watching a step by step instruction video that also points out areas of concern. Finally, students can practice their knowledge by...
Doina Popovici
Math Play: Factors and Multiples Game
A jeopardy style game that students can play with others or alone to practice their skills at identifying multiples and factors.
Amby Duncan-Carr
Greatest Common Factor/online Lesson
A complete lesson on Greatest Common Factors, including methods of finding, examples, and a practice multiple-choice quiz.
McGraw Hill
Glencoe: Self Check Chapter Test Fractions and Decimals
Students are assessed on fractions and decimals. Topics include greatest common factor, improper fractions, and fractions as decimals. The self-checking test includes hints and solutions.
CK-12 Foundation
Ck 12: Math Grade 4
Browse resources related to fourth-grade math standards. Click on a topic for interactive lessons, videos, and extra practice.
Other
Sierra College: Elementary Algebra Review Sheet and Common Formulas
This review sheet includes important rules, properties, formulas, and equations needed to solve many Algebra problems.
Khan Academy
Khan Academy: Identify Factors and Multiples
Demonstrate understanding of factors and multiples. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
University of Waterloo (Canada)
University of Waterloo: Cemc: Math Circles: Number Theory Ii [Pdf]
This worksheet provides a series of problem-solving questions that require higher order thinking skills. Questions will include finding the greatest common divisor, and least common multiple.
Elias Saab
Math Drills: Lcm and Gcd Quiz
An interactive quiz which provides students with two numbers and asks them to find either the Least Common Multiple or the Greatest Common Divisor between them. Students input their solution and have the program evaluate it. Hints are...
Khan Academy
Khan Academy: Factor With the Distributive Property
Practice applying the distributive property to factor numerical expressions (no variables). Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Greatest Common Factors, Least Common Multiples
Math Forum response to request for info on how to find greatest common factors, and how this compares to least common multiples. Explanation includes examples of each.
Khan Academy
Khan Academy: Factors and Multiples Intro
Explains what factors are and uses images to visualize the different factors of whole numbers. Next, discusses how to find factors without images and how to identify factor pairs. Multiples are then explained and how they relate to...
Mathigon
Mathigon: Math Foundations: Divisibility and Primes: Factors and Multiples
This lesson focuses on factors and multiples; it explains each and provides practice activities and a quiz.
Khan Academy
Khan Academy: Factors and Multiples Review
Reviews what factors and multiples are and provides some problems for practice. Solutions are accompanied by explanations.
E-learning for Kids
E Learning for Kids: Math: Penguins: Factors and Multiples
On this interactive site students practice various skills including square numbers, multiples, factors, composite numbers, and mixed numbers.
Khan Academy
Khan Academy: Factor Pairs
Practice finding factor pairs for whole numbers. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Other
Help With Fractions: Finding the Least Common Multiple
This website gives an excellent explanation of how to find the least common multiple. It offers two different methods and gives easy to follow step by step directions.
Louisiana Department of Education
Louisiana Doe: Louisiana Believes: Eureka Math Parent Guide Multip, Div With Units of 0, 1, 6 9, and Multiples of 10
A guide to support parents as they work with their students in multiplication and division with units of 0, 1, 6-9, and multiples of 10.
E-learning for Kids
E Learning for Kids: Math: Igloo: Multiplication
On this interactive website students practice various math skills using a real life scenario with a hockey team. Those skills include completing multiplication facts up to 100, making a list of multiples of a number, and locating factors...
Khan Academy
Khan Academy: Prime and Composite Numbers Intro
Discusses factors, prime and composite numbers, and why the number 1 is not prime or composite. Includes practice problems throughout, along with explanations of solutions.