National Council of Teachers of Mathematics
The Math Forum: Unit Vectors From Others
Description of how to derive the unit vector from a particular vector.
National Council of Teachers of Mathematics
The Math Forum: What Good Are Dot Products?
Explanation and illustration of the use of dot products in physics.
National Council of Teachers of Mathematics
Nctm: Figure This: Are Dice Fair or Not?
Is it fair or not fair? That is the question. Try this math challenge where you use your probability and number sense skills to determine whether or not a game is fair. Find out how mastering this challenge can be useful in real life...
National Council of Teachers of Mathematics
Nctm: Figure This: Gasoline Tanks
Inquiring minds want to know, how far can you go on a tank of gas? See if you can figure out this math challenge that explores rate, distance, and time. A one page activity from the NCTM Math Challenges for Families series. Application...
National Council of Teachers of Mathematics
Nctm: Figure This: Fractals
Can you figure out what pattern comes next? Explore patterns and perimeter in this math challenge on fractals. A one page activity from the NCTM Math Challenges for Families collection.
National Council of Teachers of Mathematics
Nctm: Figure This: Combination Locks
If you're good with numbers, then here's a challenge just for you. See if you can figure out how many three number combinations you can make using numbers from 0 to 39. A probability challenge that explores number arrangements. Taken...
National Council of Teachers of Mathematics
Nctm: Figure This: Beanie Babies, Profit or Loss
Is you Beanie Baby business booming or busted! Figure out if you made a profit or lost money in this mathematic computation activity. A one page activity from the NCTM Math Challenges for Families collection that focuses on adding and...
National Council of Teachers of Mathematics
Nctm: Figure This: Big Trees
What tree is big enough for a car to drive through? Figure it out with this NCTM math challenge on measurement. Find out why understanding measurement is important in everyday life. A one page activity from the NCTM Math Challenges for...
National Council of Teachers of Mathematics
Nctm: Figure This: Who's on First Today?
Batter up! Who has the higher batting average, Joe McEwing or Mike Lieberthal? Try your computation and averaging skills in this real-world math challenge. Learn how sharpening your averaging skills can be valuable in real life...
National Council of Teachers of Mathematics
Nctm: Figure This: Chocolate (Pdf)
Here's a delicious math challenge for chocolate lovers! Use your estimation and measurement skills to discover which irregular shaped, chocolate covered cookie has the largest surface area. A one-page activity from the NCTM Math...
National Council of Teachers of Mathematics
Nctm: Figure This: What's My Angle?
Do people with big hands have larger angles between their fingers? See if you can find the answer this question when you try this math challenge on estimating and measuring angles. Discover how understanding angles and geometric shapes...
National Council of Teachers of Mathematics
Nctm: Figure This: How Can You Use Old Stamps?
Test your number sense and problem-solving aptitude with this math challenge using postage stamps with different values. This one-page activity from the NCTM Math Challenge for Families series focuses developing skills that can be used...
National Council of Teachers of Mathematics
Nctm: Illuminations: Robot Sketcher
Explore this awesome tool that animates a robot that contains sliding arms (like those used in hydraulics) and rotating arms like those used in rotary motors. The exploration asks students to consider how to find the area drawn by the...
National Council of Teachers of Mathematics
Nctm: Illuminations: Shape Sorter
Students learn how to categorize plane figure polygons using Venn Diagrams with this computer based tool.
National Council of Teachers of Mathematics
Nctm: Illuminations: Igd: Area of a Parallelogram
Use this interactive tool to learn how to find the area of a parallelogram. Click on "Instructions" for details on how to use this tool. Click on "Explore" for more ideas.
National Council of Teachers of Mathematics
Nctm: Illuminations: Fire
Use this applet to demonstrate the spread of a forest fire. The applet takes into consideration the probability that a tree adjacent to a burning tree will catch fire, and it shows how much of a sample forest will burn. Repeat the fire...
National Council of Teachers of Mathematics
Nctm: Illuminations: Interactive Times Table
Use this interactive multiplication table to practice the multiplication facts through 9 X 9. CCSS.Math.Content.4.OA.A.1 Interpret a multiplication equation as a comparison
National Council of Teachers of Mathematics
Nctm: Illuminations: Angle Sums
Students may use this computer applet to explore angle sums of triangle, quadrilaterals, pentagons and hexagons.
National Council of Teachers of Mathematics
Nctm: Illuminations: Ten Frame
Use the 10 frame to count the amounts given and find the total. Five different games are available to practice counting and combining amounts.
National Council of Teachers of Mathematics
Nctm: Illuminations: Fraction Concentration
Click on the "Cards" dropdown menu and choose "Fractions". Play concentration matching fractions, fraction words, and visual representations for fraction amounts. Pick numbers from 1 to 6 or 1 to 10. One or two can play this game.
National Council of Teachers of Mathematics
Nctm: Figure This: Tv Ratings (Pdf)
Here's a challenge for the avid TV watcher. Use your data interpretation skills to explore America's TV watching habits in this NCTM Math Challenges for Families activity. See if you can figure out which night of the week has the...
National Council of Teachers of Mathematics
The Math Forum: The Art of Oriental Carpets
This site from the Math Forum of Drexel University gives an idea of how symmetry and pattern is used in oriental carpets. Links are provided throughout for additional information on related subjects.
National Council of Teachers of Mathematics
The Math Forum: Similarity and Congruence
This site from Dr. Math at the Math Forum provides a collection of problems and exercises that require knowledge of the relations between similar or congruent shapes. Solutions are provided.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Graphing a Parabola
Dr. Math helps a student interpret the equation of a parabola so that the student understands how each part of the equation effects the graph.