National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: The Distributive Property
Dr. Math responds to a letter written by an eight grader concerning the Distributive Property. He uses good examples to strengthen his explanation.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Determining Triangle Similarity
Dr. Math responds to a question about how to determine if two triangles are similar. The Dr. goes into detail about the process and gives several examples that are worked out for you.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: The Value of Two Column Proofs
This site explains why we prove things. The explanation gives real world scenarios and an everyday example of why we should learn how to prove things.
National Council of Teachers of Mathematics
The Math Forum: Graphing Linear Functions
Use this guide to practice graphing linear functions using Claris Works with your students. The lesson walks you through the process of setting up Claris Works step-by-step.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Solving Inequalities
This site goes through steps to graph an inequality posed by a student.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Squaring Pennies
A cute story about exponential growth.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Partial Fractions
Math Forum offers a description of remainder and factor theorem and gives and example of their uses.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Expanding Binomials and Pascal's Triangle
This Math Forum site explains how expanding binomials relates to Pascal's Triangle.
National Council of Teachers of Mathematics
The Math Forum: An Introduction to Parabolas
"Dr. Math" wonderfully discusses the basics of parabolas. He identifies where in our lives we would see parabolas as well as mentioning some of the terminology associated with them. A link is provided for information on conic sections.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Parabola Equation
Dr. Math, in a reply to a student's question, describes how to obtain the equation of a parabola.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Graphing Parabolas
Dr. Math helps a student with the plotting and with finding the vertex and line of symmetry of a parabola.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Parabola
Dr. Math, in a reply to a student's question, explains how to find the location of the vertex and focus, calculate the distance between the focus and vertex, as well as identify the axis of symmetry and the directix.
National Council of Teachers of Mathematics
The Math Forum: Golden Ratio, Fibonacci Sequence Faq
This site contains questions and answers regarding the Golden Ration and how the Fibonacci numbers relate to the ratio of lengths of golden rectangles. Related links are available at the end of the site.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Cake Recipe Ratio
Dr. Math has to go into the kitchen to solve this real-world problem. A student is looking for a solution to a ratio problem about baking a cake. You'll need to stir up your knowledge of ratios, fractions, decimals, proportions, and...
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Direct and Indirect Variation
Dr. Math addresses the difference between direct and indirect variation. The Dr. gives several examples through his explanation, using real-world scenarios. The Dr. describes how problems are typically stated for indirect variation and...
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Composite Functions
Dr. Math explains a common mistake made by students with compostion of functions. Dr. Math goes through an example problem of function composition with a short explanation.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Using Conjugates to Simplify Radicals
This question-response site gives information about simplifying an expression using conjugates. The Dr. first details the fundamentals of conjugates and then works several examples.
National Council of Teachers of Mathematics
The Math Forum: Analytic Geometry: Polar Coordinates
This site from The Math Forum provides great information on polar coordinates. You can access this information either by clicking on the coordinates link or just scrolling down, it is the first one listed on the page. Includes several...
National Council of Teachers of Mathematics
The Math Forum: Drexel Math Forum: Adventures in Statistics
This lesson incorporates problem-solving and data collection to satisfy a fifth grade class's curiosity about the size of their classroom with respect to a sixth grade classroom.
National Council of Teachers of Mathematics
The Math Forum: Traffic Jam Activity Lesson Plan
There are seven stepping stones and six people - three on the left facing the three on the right. How is it possible to have the three on the left end up on the right, and vice versa, while everyone was at all times standing on a stone...
National Council of Teachers of Mathematics
The Math Forum: Polyhedra in the Classroom
Lesson plans for many student activities which introduce the concept of polyhedra into the classroom. Some activities can be accomplished by hand with paper, pencils, and scissors, but the unit works best if the students can regularly...
National Council of Teachers of Mathematics
The Math Forum: Math Topics: Topology: Knot Theory
An extensive collection of sites on the topic of Knot Theory. Links to dozens of sites are provided which take the user from the basic definition of KT, through to detailed Applet programs which create knots on the spot. NOTE: Some links...
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.
National Council of Teachers of Mathematics
The Math Forum: The History of the Coordinate Plane
Everything you'd like to know about the coordinate plane can be found here! Who invented and named it, what vocabulary words have been associated with it, and what notations are connected with it. All this and more about the history of...