National Council of Teachers of Mathematics
Nctm: Illuminations: Euler's Line
Discover and explore Euler's Line.
National Council of Teachers of Mathematics
Nctm: Illuminations: Area of Triangles
To find the area of a triangle, try to make a parallelogram using a copy of the triangle.
National Council of Teachers of Mathematics
Nctm: Illuminations: Area of Rectangles
This applet allows for the exploration of the area of rectangles.
National Council of Teachers of Mathematics
Nctm: Illuminations: Times Table
This tool allows you to practice multiplying single-digit numbers.
National Council of Teachers of Mathematics
Nctm: Illuminations: Linear Regression I
This applet allows you to investigate a regression line, sometimes known as a "line of best fit."
National Council of Teachers of Mathematics
Nctm: Illuminations: Igd: Area of a Parallelogram
This applet will show you how to divide the parallelogram into pieces, arrange them together to form a rectangle, and then use the formula for the area of a rectangle to find the area of the parallelogram.
National Council of Teachers of Mathematics
Nctm: Illuminations: Box Plotter
Use this applet to create a customized box plot with your own data, or display a box plot of an included set of data.
National Council of Teachers of Mathematics
Nctm: Illuminations: Cubes
Use this applet to determine the volume of a box by filling it with cubes, rows of cubes, or layers of cubes. Determine the surface area as well by using the box's net.
National Council of Teachers of Mathematics
Nctm: Illuminations: Shape Tool
This tool allows you to create any geometric shape imaginable. Squares, triangles, rhombi, trapezoids and hexagons can be created, colored, enlarged, shrunk, rotated, reflected, sliced, and glued together.
National Council of Teachers of Mathematics
Nctm: Illuminations: Mean and Median
This applet allows the user to investigate the mean, median, and box-and-whisker plot for a set of data that they create.
National Council of Teachers of Mathematics
Nctm: Illuminations: Circle Grapher
Use this tool to graph data sets in a circle graph. You can input your own data or alter a pre-made data set.
National Council of Teachers of Mathematics
Nctm: Illuminations: Bar Grapher
Graph data sets in bar graphs.
National Council of Teachers of Mathematics
Nctm: Illuminations: Compound Interest Simulator
This applet will allow you to investigate savings account earnings, credit card debt, and a stock market simulation.
National Council of Teachers of Mathematics
Nctm: Illuminations: Angle Bisector
This interactive demonstrates how to bisect an angle.
National Council of Teachers of Mathematics
Nctm: Illuminations: Fraction Game
This applet allows students to individually practice working with relationships among fractions and ways of combining fractions.
National Council of Teachers of Mathematics
Nctm: Illuminations: Making Triangles
Understand the mathematical meaning of a triangle and the idea of congruence, or sameness, in geometry.
National Council of Teachers of Mathematics
Nctm: Illuminations: Describing Patterns
Give examples of various ways students might interpret the same sequence of cubes.
National Council of Teachers of Mathematics
Nctm: Illuminations: Trigonometric Graphing
Explore the amplitude, period, and phase shift by examining the graphs of various trigonometric functions.
National Council of Teachers of Mathematics
Nctm: Illuminations: Electronic Abacus
This applet explores the use of an abacus model for representing numbers and for performing addition.
National Council of Teachers of Mathematics
Nctm: Illuminations: Counting Back and Counting On
After completing this hands-on lesson, young scholars will be able to count, model, write and recognize numbers to 10.
National Council of Teachers of Mathematics
Nctm: Illuminations: Pan Balance Shapes
Use this tool to build up to algebraic thinking by exploring how to balance shapes of unknown weight.
National Council of Teachers of Mathematics
Nctm: Illuminations: Pan Balance Numbers
Use this tool to strengthen understanding and computation of numerical expressions and equality using a balance scale.
National Council of Teachers of Mathematics
Nctm: Illuminations: Geometric Solids
This tool allows you to manipulate various geometric solids and investigate their properties.
National Council of Teachers of Mathematics
Nctm: Illuminations: Grouping and Grazing
Help the alien spaceship move cows into corrals by counting, adding, and subtracting. This activity helps children learn grouping, tally marks, and place value.