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 learners 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...
National Council of Teachers of Mathematics
The Math Forum: Using Geoboards in the Classroom
A thorough look at the extensive uses of geoboards in the classroom. Links are listed which give introductory information on geoboards - for teachers new to using them. Then, lesson plans are provided for using geoboards in teaching...
National Council of Teachers of Mathematics
The Math Forum: Data Collecting in the Classroom
A list of two dozen questions students can easily ask eachother in the classroom to quickly collect data in hopes of using it in their study of making graphs. Some are opinion questions, while others require the counting of certain items...
National Council of Teachers of Mathematics
The Math Forum: Data Collecting Project Stats Class
This lesson plan provides the teacher with all the necessary handouts and directions to give a statistics class when they are ready to complete a thorough survey project. Broken into five parts, it takes the learners through the...
National Council of Teachers of Mathematics
The Math Forum: Measuring Distances Triangulation
Lesson plan which details how to have students determine the distance to an object by sighting it from two different locations and knowing the distance between these locations. As an advanced alternative, trigonometry can be used to...
National Council of Teachers of Mathematics
The Math Forum: Growth Creature Lab Data Collecting
Lesson plan completely explains how students will collect data on the growth of an "alligator" and determine the relationship of the growth data to the Fundamental Theorem of Similarity and to topics in geometry in general. All of the...
National Council of Teachers of Mathematics
The Math Forum: Classic Problems From the Dr. Math Archives
Several classics in the world of math are demonstrated on this Math Forum site. Clear explanations are given for each problem and links are included for extensions.
National Council of Teachers of Mathematics
The Math Forum: Building a Pyramid
This Math Forum lesson gives instructions on how to build a paper pyramid. Bonuses included finding the surface area and volume of the pyramid.
National Council of Teachers of Mathematics
The Math Forum: What Is a Tessellation?
The Math Forum defines and illustrates geometric tessellation.
National Council of Teachers of Mathematics
The Math Forum: Exploring Parabolas
A lesson plan using the computers to help students understand the various forms of equations of parabola. The site requires students to use the computer and offers a possible assessment of the lesson.
National Council of Teachers of Mathematics
The Math Forum: Pascal's Triangle
You will find the triangular numbers in Pascal's triangle.
National Council of Teachers of Mathematics
Nctm: Illuminations: Interactive Geometry Dictionary: Lines in Geometry
The applets in this Interactive Geometry Dictionary (IGD) will show you how to find the area of some common shapes.
National Council of Teachers of Mathematics
Nctm: Illuminations: Factorize
This resource investigates the concept of factors by creating rectangular arrays. The interactive tool allows learners to relate area to multiplication.
National Council of Teachers of Mathematics
Nctm: Illuminations: Fractal Tool
This computer tool offers studnets a chance to see fractals being made step by step, including their own, and view the mathematical data each produce.
National Council of Teachers of Mathematics
Nctm: Illuminations: Igd: Area of a Triangle
Use this interactive tool to learn how to find the area of a triangle. Click on "Instructions" for details on how to use this tool. Click on "Explore" for more ideas. [Requires Java.]
National Council of Teachers of Mathematics
Nctm: Figure This: Wheel of Fortune's Frequent Letters
Did you know that letter guessing on Wheel of Fortune is based on probability? In this challenge taken from one of TV's most popular game shows, discover what consonant or vowel should be guessed next based on letters already given. A...
National Council of Teachers of Mathematics
Nctm: Figure This: Number Tricks
Can you break the magic number code? Test your algebra aptitude in this challenge that explores number generalizations, symbols, and equations. Discover how algebraic procedures are used in everyday situations in this one page activity...