National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Solving a Ratio With & Without a Diagram
A student is searching for a solution to a ratio question without using a diagram. Dr. Math helps to break it down both with and without a diagram. An understanding of fractions, multiplication, and basic algebra is necessary to get this...
Wikimedia
Wikipedia: Additive Inverse
What is additive inverse? It means "opposite." Find out more about this concept in this detailed definition with examples and links to related terms.
TeachEngineering
Teach Engineering: The Balancing Act
Students are given the opportunity to visualize and interact with concepts they have already learned, specifically algebraic equations and solving for unknown variables. Students construct a balancing seesaw system (LEGO Balance Scale)...
Wolfram Research
Wolfram Math World: Geometry
This MathWorld tutorial provides detailed overviews of the concepts and theorems associated with geometry. Most of the Math World sites are extensive and some require higher math knowledge to understand, links to terms and topics are...
Other
Dans Math: Lessons: Basic Skills Topics
If you're looking for a short review of the basic skills needed for arithmetic, prealgebra, and beginning algebra, this could be the site for you. Dan Bach, who teaches mathematics at Diablo Valley College in California, provides brief...
CK-12 Foundation
Ck 12: Visual Patterns
[Free Registration/Login Required] Students explore the concept of visual patterns by navigating through the interactive learning module and then answering questions that go along with the module. Students can also learn more about the...
Virtual Nerd
Virtual Nerd: Interpret Parts of an Expression
A series of short video tutorials on several algebra topics for students to get a basic understanding of the concept. These video cover variables, coefficients, constants, terms, factors, and numerical and algebraic expressions.
Math2
Math2
This is a site for students and teachers of all grade levels. If you are looking for math tables, general information about math topics, or you would like to ask a question, this is the site to visit.
Other
Eduteka: Matematica Interactiva
Topics covered in this site are: concepts of numbers, geometry, algebra and statistics. This site has lesson plans, interactive activities and discussions.
Alabama Learning Exchange
Alex: Battle to the Death: Adding Integers
The goal of this lesson is for students to use manipulatives to add integers, creating concepts rather than memorizing rules. This lesson will be related to the 300 Spartans who battled the invading Persians at the Battle of Thermopylae,...