National Council of Teachers of Mathematics
The Math Forum: High School Archive for Trigonometry
This site from the Math Forum with Dr. Math is an excellent site with answers to submitted questions on trigonometry. In addition the student can submit their own questions. Links are provided for additional information.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Applications of Trigonometry
Dr. Math answers a word problem involving the use of vectors.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Midpoint Formula for Any Fraction
The Midpoint Formula finds the exact point that is halfway between two points. "Dr. Math" provides a formula that can be used to locate a point that is some fractional part of the entire segment.
National Council of Teachers of Mathematics
The Math Forum: The Four Types of Symmetry in the Plane
This Math Forum site gives visual examples of rotation, translation, reflection, and glide reflection with background information about each. Also gives problems to work on concerning symmetry.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Derivation of De Moivre's Formula
A formula using Euler's formula to derive DeMoivre's theorem. Basic calculus skills of differentiating and integrating are required to understand this explanation.
National Council of Teachers of Mathematics
The Math Forum: Ellipsoid, Torus, Spherical Polygon Formulas
Curious as to what an ellipsoid is? Dr. Math provides a picture and a brief description. This site also has information pertaining to a torus, and spherical polygon.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Volume of an Ellipsoid
Dr. Math, in a reply to a student question, discusses how to calculate the volume of an ellipsoid.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: First Principle Hyperbolas
Dr. Math, in a reply to a student question, shows how to solve for the standard equation of a hyperbola.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Volume Equations for a Sphere and Pyramid
This site uses calculus to explain how the formulas for finding the volume of a sphere and a pyramid were derived.
National Council of Teachers of Mathematics
The Math Forum: Studying Polyhedra
This site not only defines what a polyhedron is, but it allows you to view each of the five regular polyhedra through an interactive exercise. After selecting which polyhedron you'd like to see, it will tell you its name and how many...
National Council of Teachers of Mathematics
The Math Forum: Middle School Archive
This site from the Math Forum provides a list of links to many questions from the Dr. Math archive about exponents. This is a good site to use to direct you to different but associated information on the subject.
National Council of Teachers of Mathematics
The Math Forum: The History of Zero and Place Value
This ask Dr. Math question about the history of zero and place value. Includes a very in-depth answer explaining where zero came from and how it was originally used as a place holder.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Numbers
Math Forum response to request for information on various number sets. Also defined and discussed are integers, natural numbers, whole numbers, irrational numbers, transcendental numbers, and algebraic numbers.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Rationalizing the Denominator
Site gives an explaination on why we rationalize the denominator.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Rational Numbers and Square Ro
Math Forum response to which numbers, other than squared positive integers, can be simplified as rational numbers.
National Council of Teachers of Mathematics
The Math Forum: Finding 2.5 Percent of a Number
This site provides shortcuts and hints on how to do more complicated percentages without a calculator. For others beside 2.5, scroll down the left column and click percentage of choice under "Percents."
National Council of Teachers of Mathematics
The Math Forum: Probability and Statistics
This page is a math home page that includes information on all topics of probability and statistics.
National Council of Teachers of Mathematics
The Math Forum: Beat the Calculator: Adding Even Numbers
Can you beat the calculator? Your task is to find the sum of all even numbers between two and any selected two-digit even number. If you can find the number pattern, you are sure to beat the calculator every time. Links to other "Beat...
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Deductive Reasoning
An explanation and description of deductive reasoning in solving problems at this site from The Math Forum. Simple and helpful information.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: A Quadratic Inequality
"Dr. Math" responds to a student question about writing solutions to quadratic inequalities in interval form.
National Council of Teachers of Mathematics
The Math Forum: Lesson Plan Non Standard Measuring
This is a short, fun lesson plan with a literature connection, "Miss Nelson is Missing". It uses candy bars as non-standard units for measuring objects in the classroom.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Estimating Quotients
This is a question about the best way to estimate the answer to a division problem. The answer offers a basic definition of estimation, along with several methods and the positive and negative aspects of each.
National Council of Teachers of Mathematics
The Math Forum: Intro to Measurement for Primary Students
This site from the Math Forum is a great introduction to measurement for primary students. Each measurement activity has four components: interactive, manipulative-based project; technology; paper/pencil practice; literature connection.
National Council of Teachers of Mathematics
The Math Forum: Lesson Plan Non Standard Measuring
This is a short, fun lesson plan with a literature connection, "Miss Nelson is Missing". It uses candy bars as non-standard units for measuring objects in the classroom.