National Council of Teachers of Mathematics
Nctm: Illuminations: Fraction Models
Explore different representations for fractions including improper fractions, mixed numbers, decimals, and percentages. Additionally, there are length, area, region, and set models.
National Council of Teachers of Mathematics
Nctm: Illuminations: Factorize
With this activity, you can visually explore the concept of factors by creating rectangular arrays. The length and width of the array are factors of your number.
National Council of Teachers of Mathematics
Nctm: Illuminations: Coin Box
Learn how to count, collect, exchange, and make change for coins by manipulating coins using an array representation.
National Council of Teachers of Mathematics
Nctm: Illuminations: Investigating Functions With a Ferris Wheel: D vs. W
A web sketchpad activity helps students make sense of relationships between quantities, in this case the way that the distance a car travels around a Ferris wheel covaries with its "width" or horizontal distance from the center of the...
National Council of Teachers of Mathematics
Nctm: Illuminations: Bunny Times
Become confident in facts up to 12 x 12 using visual models that stress the conceptual aspects of multiplication.
National Council of Teachers of Mathematics
Nctm: Illuminations: Every Breath You Take
Students estimate the number of breaths they take, then perform an experiment to find the actual amounts.
National Council of Teachers of Mathematics
Nctm: Illuminations: The Game of Skunk
This is a great math game for students to gain an understanding of experimental probability.
National Council of Teachers of Mathematics
Nctm: Illuminations: Pandemics: How Are Viruses Spread?
The spread of a virus is influenced by four factors. In this lesson you will predict the spread of a virus over a population.
National Council of Teachers of Mathematics
Nctm: Illuminations: Building Connections
In this lesson, students translate between pictorial, written, and verbal representations of polynomials.
National Council of Teachers of Mathematics
Nctm: Illuminations: State Names
Learners use multiple representations to display how many times the letters of the alphabet is used in a state name. Concepts explored: stem and leaf, box and whisker plots, histograms.
National Council of Teachers of Mathematics
Nctm: Illuminations: Power of a Point
Use this tool to investigate what happens when point P is moved to various points within, on, and outside the circle. Can you identify any relationships among the segments and radius?
National Council of Teachers of Mathematics
Nctm: Illuminations: Creating, Describing, and Analyzing Patterns
Encourage students to use visualization, spatial reasoning, and geometric modeling to build their own patterns or recreate one from given square arrays.
National Council of Teachers of Mathematics
Nctm: Illuminations: Product Game
The Product Game is a fun, interactive game that exercises your skill with factors and multiples.
National Council of Teachers of Mathematics
Nctm: Illuminations: Patch Tool
Use this tool to design a pattern using geometric shapes.
National Council of Teachers of Mathematics
Nctm: Figure This: When in Rome
Before leaving her hotel, Polygon noticed that the temperature outside was 35 degrees Celsius. Does she need a jacket for the day? Assume a jacket is needed if the temperature is less than or equal to 50 degrees F.
National Council of Teachers of Mathematics
Nctm: Figure This: Can You Run as Fast as a Car?
During the 100 meter dash in the 1988 Olympic Games in Seoul, Florence Griffth-Joyner was timed at 0.91 seconds for 10 meters. At that speed, could she pass a car traveling 15 miles per hour in a school zone?
National Council of Teachers of Mathematics
Nctm: Illuminations: Cube Nets
This applet allows you to examine various two-dimensional figures to determine which ones can be folded into a cube.
National Council of Teachers of Mathematics
Nctm: Illuminations: Algebra Tiles
Use tiles to represent variables and constants to solve algebra problems. Solve equations, substitute in variable expressions, and expand and factor.
National Council of Teachers of Mathematics
Nctm: Illuminations: Concentration
Play a matching game with different representations of equivalent items.
National Council of Teachers of Mathematics
Nctm: Illuminations: A Geometric Investigation of (A + B)2
This interactive demonstrates why (a + b)2 = a2 +2ab + b2.
National Council of Teachers of Mathematics
Nctm: Illuminations: Five Frame
The four games that can be played with this applet help to develop counting and addition skills.
National Council of Teachers of Mathematics
Nctm: Illuminations: Adjustable Spinner
Use this tool to create a spinner to examine experimental and theoretical outcomes.
National Council of Teachers of Mathematics
Nctm: Figure This: Airport Runways
Why are airport runways numbered? The math challenge is to figure out the missing runway number.
National Council of Teachers of Mathematics
Nctm: Figure This: Archeology
Site A! Site B! How alike are we? Using the information from the chart, which two dig sites seem to be most alike?