National Council of Teachers of Mathematics
The Math Forum: Famous Problems in the History of Mathematics
On this site, there are several math problems to explore and solve. Look through some solutions by famous mathematicians and expand your thinking about some interesting math concepts. Teachers of elementary grades may want to use this...
University of St. Andrews (UK)
University of St. Andrews: Eratosthenes of Cyrene
Gives details of the accomplishments of Eratosthenes in the field of mathematics.
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....
Help Algebra
Help algebra.com: Fractions
This resource offers an overview of fractions from several aspects, including simplifying, reduced, mixed numbers and improper form, and basic operations. Examples and diagrams are included to help demonstrate each topic.
Wolfram Research
Wolfram Mathworld: Polynomial Factorization
This site discusses factoring of polynomials, giving a general definition, and many links to satisfy unfamiliar terminology. There are however very few examples.
University of Cambridge
University of Cambridge: Nrich: Tom's Number
Use the clues Tom gives you to figure out his number. The solution is right there on this one page website.
Texas Education Agency
Texas Gateway: Applying the Order of Operations
Given a numerical expression including whole number exponents and prime factorization, students will use the order of operations to generate an equivalent expression.
University of Vienna (Austria)
University of Vienna: Set of Solutions
Interactive assessment in which the solution set of an equation is found. Combines equation solving skills with set notation, introduces empty sets, intersections, subsets of real numbers (rational, integer, prime, etc.).
Curated OER
University of St. Andrews: Marin Mersenne
Even though his equation to determine all prime numbers did not succeed, it did help the investigation of large prime numbers.
Cuemath
Cuemath: Factors
A factor of a number in math is a number that divides the given number. Factors are used in many situations in daily life. This article explains factors and how to find factors using multiplication and division. Included are solved...
Cuemath
Cuemath: Least Common Multiple
Learn about the properties of Least Common Multiples (LCM) and the three methods to find the LCM. Included are solved examples and interactive problems for review.
Google
Google for Education: Measuring Complexity of Function or Algorithm
In this lesson, students learn how to measure the complexity of the function or algorithm in a math problem and understand how this applies to real world situations.
CK-12 Foundation
Ck 12: Math Grade 3
Browse resources related to third-grade math standards. Click on a topic for interactive lessons, videos, and extra practice.
Cuemath
Cuemath: Square Root of 98
In this mini-lesson, learn how to find the square root of 98 using various methods.
PBS
Pbs: Greatest Common Factor
In this video, learn how to find the greatest common factor of two numbers. Then, see how this can be used to solve problems with large numbers. In the accompanying classroom activity, students learn to find prime factors using factor...
Other
Appalachian State University: Sets and Bags
This page provides extensive information about sets and bags. Includes descriptive set notation and examples.
AAA Math
Aaa Math: Least Common Multiple
This tutorial offers an explanation of least common multiples, practice finding them and a game to play. There is a lot of information available at this location.
Wolfram Research
Wolfram Math World: Pascal's Triangle
This site from MathWorld provides great information on Pascal's Triangle. Links are provided throughout for additional information, along with several helpful charts and formulas. This is a good site to check out on the subject.
Other
Greatest Common Factor Calculator
Free online calculator provides help with finding the greatest common factor.
Math Aids
Math Aids: Fractions Worksheets
Great resource for learning and practicing fractions and their different operations. Math worksheets are printable, may be customized, and include answer keys.
Quia
Ixl Learning: Least Common Multiple
Brush up on your math skills relating to the least common multiple then try some practice problems to test your understanding.
Calculator Soup
Calculator Soup: Factoring Calculator
The factoring calculator finds the factors and factor pairs of a positive or negative number. Enter an integer number to find its factors.
ClassFlow
Class Flow: Greatest Common Factor
[Free Registration/Login Required] This flipchart assists in the instruction of finding the Greatest Common Factor. Two methods for identifying GCF are used.
Calculator Soup
Calculator Soup: Lcm Calculator Least Common Multiple
The Least Common Multiple (LCM) is also referred to as the Lowest Common Multiple (LCM) and Least Common Divisor (LCD). For two integers a and b, denoted LCM(a,b), the LCM is the smallest positive integer that is evenly divisible by both...
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