National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Rational Root Theorem
This question answer site gives two responses to a question about the Rational Root Theorem, also known as The Rational Zero Theorem. The first response solves a couple of problems through applying the theorem. The second response...
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Standard Form of a Line
Dr. Math gives an inspiring and clear discussion about equations of lines and lines as functions. The Dr. discusses the benefits of the standard form of a line and prompts the student with an equation which can not be written in the...
National Council of Teachers of Mathematics
The Math Forum: Triangle Formulas
Investigate the geometric definitions of triangles, focusing upon equilateral, isosceles, right, and scalene with detailed drawings and appropriate formulas for each. This site has links to more information on triangles.
National Council of Teachers of Mathematics
The Math Forum: Lines and Slope: Chameleon Graphing
Join Joan the chameleon in an exploration of lines and slope. You'll be drawing lines, calculating slope, using equations and more!
National Council of Teachers of Mathematics
Nctm: The Math Forum
This is a useful site with lesson plans, problems of the month, etc.
National Council of Teachers of Mathematics
The Math Forum: Making Patterns
Explore the literature connections, online activity, pencil and paper activity, and the manipulative investigation of patterns and geometric shapes on this page!
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Dividing Fractions
This site has an explanation of how to divide fractions by multiplying the reciprocal of the denominator. It explains why you invert and multiply! This site also contains links to numerous Math Forum sites pertaining to fractions,...
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: "N^0"
"Why is any number raised to the zero power equal to one?" A good question and an even better answer
National Council of Teachers of Mathematics
The Math Forum: Imaginary Exponents and Euler's Equation
"What does it mean to have an imaginary exponent?" This site has an exceptional answer and explains it in two different ways
National Council of Teachers of Mathematics
The Math Forum: Geoboard Activities
Math Forum provides a set of links to sites that are related to geoboard activities. There are several great links to lessons using geoboards. The links provide insight into how to use them, including how to perform various measurements...
National Council of Teachers of Mathematics
The Math Forum: Elementary School Teacher's Place
The Math Forum provides lesson plan collections for elementary school teachers. Search the collection of lesson plans by scrolling down to the bottom of the page.
National Council of Teachers of Mathematics
The Math Forum: Middle School Teacher's Place
The Math Forum provides a collection of middle school math lesson plans. Search capability is offered at the bottom of the page.
National Council of Teachers of Mathematics
The Math Forum: Problem of the Week
Math Forum has a site for problem of the week for Elementary, Middle, and High School. Subject areas include Pre-Algebra, Algebra, Geometry, and Pre-Calculus. Go through the archives of past problems dating back to 2001.
National Council of Teachers of Mathematics
The Math Forum: Math Fundamentals Problem of the Week
Math Forum gives a fundamental math problem for students in general math to work on each week with the answer to the previous week's question available. An archive of weekly problems and solutions is provided as well.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Parabola Focal Point
Dr. Math discusses some of the "rules" of parabolas that are specific to the focal point.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Parabola Problems
Dr. Math tackles a problem about culverts. This is in response to question posed by a student.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Equation of a Parabola
Dr. Math, in a reply to a student question, shows how a parabola is just a quadratic equation.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Parabolic Equation of an Arch
A student, in writing to Dr. Math, wants to know how to find the equation of the parabola of McDonald's arches. Dr. Math helps the student get started with the problem.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Rotating Parabolas
Dr. Math, in a reply to a student question, shows how to derive the equation of a parabola for situations when the line of symmetry is not || to one of the axes.
National Council of Teachers of Mathematics
The Math Forum: Defining Geometric Figures
This site provides an in-depth definition of a two-dimensional figure and a three-dimensional figure. Related terms include arcs, vertices, polygon, and many more.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: About Pi
This site provides an in-depth discussion on what pi is. It gives a brief history revealing what the Egyptians and Babylonians estimated pi at.
National Council of Teachers of Mathematics
The Math Forum: Elementary Geometry Circles
The Math Forum offers an archive of question and answer sessions on circles and how they relate to geometry.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Area of a Cone
This question and answer site is about finding the area of a cone when the height and the angle at the convergence point are given. The site goes on to explain how a cone relates to a circle.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Conic Sections and Parallel Li
This question and answer site from Dr. Math at the Math Forum looks at the situation of cutting a cone with a plane to get parallel lines. Can this be done?