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: Ratios
This resource describes how to calculate ratios and provides an opportunity for students to practice the skill.
Stefan Warner and Steven R. Costenoble
Finite Mathematics & Applied Calculus: Predicate Calculus
The resource investigates predicate calculus. The tutorial examines propositional calculus, universal quantifiers, mathematical statements, and divisibility. Students learn about the logic concepts through notes and examples. Practice...
Quia
Ixl Learning: Divisibility Rules With Numbers Up to 10,000
Practice divisibility rules with numbers up to 10,000.
Quia
Ixl Learning: Divisibility Rules With Dividend Up to 10,000,000
Divisibility rules practice with numbers up to 10,000,000.
Math Is Fun
Math Is Fun: Divisibility Rules
A chart that overviews divisibility rules for numbers divisible by numbers 2 through 12. Simple rules accompanied by examples.
National Council of Teachers of Mathematics
The Math Forum: Divisibility Test Game "Nullo"
The lesson plan for two to four players engaged in an active card game to determine the divisibility of a number. The materials needed, the rules of the game, and the methods of scoring are all explained for the teacher.
Purple Math
Purplemath: Lcm & Gcf
Purplemath shows an easy and orderly way to determine the GCF and LCM of any two numbers. Even large numbers won't be a challenge with this method.
Mathigon
Mathigon: Math Foundations: Divisibility and Prime: Greatest Common Factors
This lesson focuses on the greatest common factors it poses real situations and asks students answer them and then it provides more information and more exercises.
TED Talks
Ted: Ted Ed: Can You Solve the Fish Riddle?
In this riddle, some endangered fish species are being transported by water and a storm causes them to be thrown overboard. Your task is to devise a way to rescue them. The video provides some pointers on how to approach the problem....
Mathigon
Mathigon: Algebra: Sequences: Pascal's Triangle
This lesson focuses on Pascal's Triangle, a number pyramid in which every cell is the sum of the two cells directly above. It contains all binomial coefficients, as well as many other number sequences and patterns.
Better Lesson
Better Lesson: Divisibility Rules
The students will be investigating mathematical rules for division to assist them with fluency. This activity will be added to their tool box!
Cool Math
Coolmath: Pre Algebra Divisibility Tests
Known as Guzzinta Tests, here are some quick tricks you can learn to see if a number is divisible, can be divided by, another number.
AAA Math
Aaa Math: All About Division
These tutorials teach division operations covered in K8 math courses. Each section has an explanation, interactive practice and challenge games about division.
National Council of Teachers of Mathematics
The Math Forum: Basic Divisibility Rules
This site offers a short quick reference list of divisibility rules with links to the explanations
The Math League
The Math League: Whole Numbers & Basic Properties
Here is a nice resource for students and teachers about whole numbers and their basic properties. It provides links to information on place value, expanded form, and rounding numbers are just a few of the topics on this page.
Quia
Quia: Divisibility and Prime
If you enjoy playing the game Battle Ship you will enjoy this game. When you locate an enemy ship to get the hit you must correctly answer a question using your knowledge of divisibility rules and prime numbers. It is a fun way to...
San Diego State University
San Diego State University: Divisibility War
This site offers the rules of divisibility and a game for practicing those rules. Everything is included in the site for making this game. Don't be discouraged by the length of the explanations!
ClassFlow
Class Flow: Number Sense Related to Division
[Free Registration/Login Required] This flipchart introduces divisibility, primes and composites, averages, and estimating quotients.
Math Slice
Math Slice: Divisibility
This resource contains timed practice for divisibility rules. There is a link to an explanation of the divisibility rules. Students receive instant feedback and an opportunity to practice again.
Other
Project Happy Child: Times Tables Division Worksheets
50 basic division worksheets are available at this web site. They can be printed and used for a variety of practice purposes. Some helpful hints are included to avoid mindless practice that could quickly become counter productive.
Other
Project Happy Child: 100s Board Worksheets
Use these 100s Boards to have students check for divisibility by 2-12 and for square and prime numbers. Just find the links below the 100s board that has the directions printed right on top of the worksheet.
ClassFlow
Class Flow: Biz Buzz
[Free Registration/Login Required] Discover and apply divisibility rules for 2, 3 and 6.
ClassFlow
Class Flow: Divisibility & Factorials
[Free Registration/Login Required] Testing for divisibility of 0, 2, 3, 4, 5, 9, 10 & 11. This flipchart explores factorials and perfect numbers as well.