National Council of Teachers of Mathematics
The Math Forum: "Make One" Operations W Fractions Game
This card game will help students review the basic operations with fractions. The materials needed, the rules of the game, and several follow-up activities are provided here for the teacher as a lesson plan.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Hyperbolic Geometry
Dr. Math, responds to a question fro a nineth grade stduent who wants to understand hyperbolic geometry. The Dr. uses descriptive analogies in attempts to unravel why triangles in hyperbolic geometry have less than 180 degrees in them.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Meaning of an Absolute Value Inequality
"Dr. Math" presents an in-depth discussion of the meaning of an absolute value inequality. The discussion tries to clarify some of the mis-conceptions surrounding absolute value.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Graphing an Ellipse
Dr. Math, in a reply to a student question, mentions a couple of different methods to use to obtain the graph of an ellipse, the doctor details one way by using the known coordinates of a circle.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Equation for an Arch
A student with a summertime carpenter job asks Dr. Math how to draw an arch. Dr. Math responds by showing how the equation of the parabola can be generated by having three distinct points of the parabola known.
National Council of Teachers of Mathematics
The Math Forum: Famous Problems in the History of Mathematics
On this site, there are several math problems to explore and solve. Look through some solutions by famous mathematicians and expand your thinking about some interesting math concepts. Teachers of elementary grades may want to use this...
National Council of Teachers of Mathematics
The Math Forum: Building Shapes
Based on building a hexagon, this activity from the Math Forum collection focuses on using different combinations of pattern blocks to create a hexagon. An online activity, pencil and paper method, literature connections, and a...
National Council of Teachers of Mathematics
The Math Forum: Line Symmetry
This site from The Math Forum is a great site if you are looking for activities to engage your students in learning about line symmetry. Peruse this collection of activities for one or two or four that would be right for your students....
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Commutative Property Around Us
An interesting question is posed to Dr. Math about the commutative property in the world around us. This shows an awesome connection between math and everyday life. Students will get this one!
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Comparing Ratios and Fractions
Dr. Math helps a student see the connection between fractions and ratios using the names of Flintstone characters. A clever approach that requires an understanding of basic algebra concepts.
National Council of Teachers of Mathematics
The Math Forum: Slope Intercept
Use this site to learn how to write an equation in slope-intercept form if you already have the graph of the line. Let Joan the Chameleon walk you through the process.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Direct and Inverse Variation
Dr. Math gives hints of how to solve a problem with inverse and direct variation. The site includes how inverse and direct variation problems are set up using initial and final conditions. The student can then solve for the unknown. A...
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Standard Form in Linear Equations Useful
Dr. Math discusses the usefulness of standard form of linear equations on this page. The Dr. discusses parallel and perpendicular lines as well as graphing techniques. The Dr. touches on what the canonical form is and its usefulness.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Closure
Dr. Math explains the algebraic concept of closure. Dr. Math gives several examples and explains why the set is closed under the operation or not.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Proving the Existence of the Centroid
At this site you will find the proof of the existence of the centroid for any triangle.
National Council of Teachers of Mathematics
The Math Forum: Domino Activity
This Math Forum site has middle schoolers discover the the pattern of the Fibonacci Numbers by playing with dominos
National Council of Teachers of Mathematics
The Math Forum: Euclid's Geometry: History and Practice
This is a set of four lessons on Euclid's Elements. The lessons include a short history, assignments, essay questions and a quiz.
National Council of Teachers of Mathematics
The Math Forum: Regular Tessellations
This site contains a lesson plan on tessellations. There is a link to the NCTM standards that fit this lesson plan and a link to an applet that is useful to both teacher and student.
National Council of Teachers of Mathematics
The Math Forum: Algebraic Problem Solving Using Spreadsheets
A unit is presented on instructing students how to build and use spreadsheets for algebraic problem solving. Easy-to-follow steps are provided along with problems for students to practice.
National Council of Teachers of Mathematics
The Math Forum: Multiplying Magic Squares
The math concept of "Magic Squares" is explored here with basic terminology and examples to begin with. Once students have mastered these, the more challenging idea of how to multiply magic squares is introduced. Review materials are...
National Council of Teachers of Mathematics
The Math Forum: Putt Putt Golf in the Math Classroom
Putt-Putt golf can be a great tool in helping students understand angles and their reflections. Here a teacher demonstrates the "Course," set up in his classroom to assist in explaining to students how to use geometry and angles in...
National Council of Teachers of Mathematics
Nctm: Illuminations: Line of Best Fit
Use this applet to learn about a line of best fit for a set of data points. Some example data in this site include statistics from the 2004-2005 LA Lakers season. Students can guess the equation for a set of data points before the applet...
National Council of Teachers of Mathematics
Nctm: Figure This: Misaddressed Mail
Try this probability challenge from the NCTM Math Challenges for Families series. See if you can figure out the probability of putting three checks in the correct envelopes without looking. Also, discover how probability skills are used...
National Council of Teachers of Mathematics
Nctm: Figure This: Census
Try this real world challenge that focuses on data collection, data analysis, and problem solving with information from the U.S. Census Bureau. Discover how these skills are applied in real life situations in this one page activity from...