Number Sense
&
Patterns  
 

MyMathTutor: PreAlgebra Topics 
(online video tutorials about pre-algebra topics)

Estimate: 
(use a number line to develop/practice skills in estimation)

Estimating a Sum by Rounding
(A quick way to estimate the sum of two numbers is to round each number and then add the rounded numbers).

Rounding Off: 
(round off numbers to significant figures & decimal places)

Sequences
(Work out the 4th, 5th, 10th, 20th and nth terms in a number sequence.)

Number Cruncher
(lists input and output in a table and will not let the user attempt to guess the rule on without at least having two data points.)

Algebra Balance Scales
(Solve simple linear equations using a balance beam representation.)

Late Delivery
(Identify values for a variable)

Equation Match
(Identify equations with the same value for “x”)

Function Machine
(Solve one and two step problems)

Interactive Mathematics: Function Machine –
(Input values into this machine and observe the output)

Whole Number Cruncher
(explore simple linear functions involving whole numbers)

Decimal Operations
&
Scientific Notation

Sock: Adding Decimals
(3D game.  Push the green blocks into the holes to make the target number.)

Decimals: Fast Facts -
(add, subtract, multiply, divide, & round decimals, has a place value chart)

Decimals
(These pages teach operations on decimals covered in K8 math courses.
Each page has an explanation, interactive practice and challenge.)

Scientific Notation
(Convert standard numbers to scientific notation.)

Scientific Notation Generator
(practice converting any number from basic notation to scientific notation.)

Data
 &
Statistics

Data Picker
(Gathering & totaling data; identifying corresponding graphs)

Shodor: Histograms
(input and view data using a histogram)

Illuminations: Create a Bar Graph
(input data & create a bar graph)

Shodor: Pie Chart
(manipulate a pie chart to represent data)

Illuminations: Create a Circle Graph
(input data & create a circle graph)

Shodor: Stem & Leaf Plotter
(organize and graph data  into Stem and leaf plots. This applet can also be used help students practice calculating mean median and mode.)

Shodor: Box Plot 1
(View data in individual sets and compile data in to one large set.  Introduce students to the terminology used with box plots. This box plot applet does use the median to calculate the interquartile range)

Shodor: Box Plot 2
(View data in individual sets and compile data in to one large set.  Introduce students to the terminology used with box plots. This box plot applet does not use the median to calculate the interquartile range)

Shodor: Plop It!
(Allow students to graph their information using a simple bar graph and investigate mean, median, and mode.)

Integers
&
Fractions

Beginning Fractions
(identify fractions shown as pictures)

Fractions - Parts of a Whole
(relates parts of a whole unit to written description & fraction)

Shodor's Fraction Converter
(create equivalent fractional graphics)

Shodor's Equivalent Fractions Finder
(create equivalent fractional graphics)

Shodor's Fraction Four
(Practice simplifying, converting, multiplying, decimals, &, & fractions)

Fractions-Multiple Activities
(Operations on fractions covered in K8 math courses. Includes explanation, interactive practice & challenge games about fractions)

Count On: Fraction Games
(several games using operations with fractions)

BBC's Maths Files: Saloon Snap
(identify equivalent fractions, decimals & percents)

Count On: Circus Math Pairs Game
(match equivalent fractions and decimals)

Illuminations:  Product Game
(2-player game to practice factors & multiples)

Prime & Composite Numbers
(practice identifying prime & composite numbers)

Ambleweb's Prime Number Checker
(use this interactive machine to learn about these unique numbers)

Eratosthenes' Sieve -
(Click a number & watch its multiples become highlighted. Keep choosing numbers until all the prime numbers between 2 and 400 are displayed.)

Interactivate: Factorize
(Identify factors of numbers and illustrate on graphs)

Factortris!
(A game like "Tetris", using factors.  This online game is available on Hotmath.  Click on "games" to locate it.)

Integers
&
The Coordinate Plane

Planet Hop
(Locating points on all quadrants of the coordinate plane)

Shodor: Simple Plot
(Introduce students to the Cartesian coordinate system by having them plot ordered pairs of numbers, either as a scatter plot or with the dots connected.)

Shodor: Ordered Simple Plot
(Allows the user to plot and connect ordered pairs in the order that they are input. This enables pictures to be drawn by connecting the pairs rather than having the computer connect them from left to right..)

Virtual Manipulative:  Circle Zero
(A puzzle involving adding positive and negative integers to sum to zero.)

Virtual Manipulative:  Circle 21
(A puzzle involving adding positive and negative integers to sum to 21.)

Virtual Manipulative:  Circle 99
(A puzzle involving adding positive and negative integers to sum to 99.)

Virtual Manipulative:  Color Chips Addition
(Use color chips to illustrate addition of integers.)

Virtual Manipulative:  Color Chips Subtraction
(Use color chips to illustrate subtraction of integers.)

Shodor: Simple Coordinate Game
(Introduce students to the Cartesian coordinate system by having them calculate and enter the coordinates of a randomly placed house. This particular applet only deals with the first quadrant)

Shodor: General Coordinates Game
(Introduce students to the Cartesian coordinate system by having them calculate and enter the coordinates of a randomly placed house. This applet is a more complicated version of the Simple Coordinates Game and uses all four quadrants)

Shodor: Simple Maze Game
(Allow students to have fun while mastering their understanding of how the Cartesian coordinate system works by maneuvering a robot through a mine field. This applet only utilizes the first quadrant.)

Shodor: Maze Game
(Allow students to have fun while mastering their understanding of how the Cartesian coordinate system works by maneuvering a robot through a mine field. This applet utilizes all four quadrants.)

Billy Bug 2
(A game to locate points on all quadrants of the coordinate plane)

Algebra vs. The Cockroaches
(It's you against the cockroaches crawling on your graph paper!  This online game is available on Hotmath.  Click on "games" to locate it.)

Ratios, Proportion, Slope & Scale

Small Blue Printer
(Build your own dream house, view it from above and take a 3D walk through it. Addresses elements of scale.)

Figure & Ratio of Area
(Change the width and height with this Applet, and consider the relation between ratio of rectangle areas and the one of width and height.)

Measuring with Shadows
(Did you know that you can use shadows and a meter stick to measure very tall objects from the ground? You can measure a tall building or a tall tree. If you could travel back in time, you could even measure the height of a Tyrannosaurus Rex?  You will in this activity.)

Shodor: Slope Slider
(Help students manipulate the linear function F(x)=mx+b and explore the relationship between slope and intercept in the Cartesian coordinate system.)

Shodor: Function Flyer
(This version of Slope Slider allows the student to enter in the function of his or her choice. This will encourage the user to explore the effects on the graph of manipulating the constants and coefficients. This applet can also be used as tool to correct graphing work sheets.)

Geometry
 &
 Measurement

Nettrain:  What is an Angle?
(Students learn basic concepts, terminology, and use of angles.)

Ambleweb's What's My Angle?
(online resource for teaching angles)

Ambleweb's Angle Activities?
(20 interactive investigations using a protractor)

Nettrain:  Angle Hypatia
(Students identify, label and calculate angles that are supplementary, complementary or corresponding)

Nettrain:  Triangles
(identify triangles as two dimensional shapes by their name and attributes)

Nettrain:  Triangles (in Spanish)
(identify triangles as two dimensional shapes by their name and attributes)

Nettrain: Right Triangles
(basic right triangles)

Nettrain: Geometric Shapes
(Students learn to distinguish between geometric and irregular shapes.)

Nettrain: Geometric Shapes (in Spanish)
(Students learn to distinguish between geometric and irregular shapes.)

Nettrain: Polygons
(recognize and distinguish polygons with a focus on the quadrilateral, trapezoid and rhombus.)

Nettrain: Congruent Shapes
(Students learn the concept of congruency between geometric shapes.)

Nettrain: Congruent Shapes (in Spanish)
(Students learn the concept of congruency between geometric shapes.)

Nettrain:  Transformation Trio
(Students learn to identify that plane objects can be transformed by translation, rotation and reflection)

The Tessellation Tool
(build tessellations, translate and rotate)

Tessellations
(Using regular and semi-regular tessellations to tile the plane)

Tessellations:  Transformations:  Reflections
(Dynamically interact with and see the result of a reflection transformation.)

Tessellations:  Transformations:  Rotation
(Dynamically interact with and see the result of a rotation transformation.)

Tessellations:  Transformations:  Translation
(Dynamically interact with and see the result of a translation transformation.)

Shodor: Transmographer
(Students explore the world of translations, reflections, and rotations in the Cartesian coordinate system by transforming squares, triangles and parallelograms. Parameters: Shape, x or y translation, x or y reflection, angle of rotation.)

Measurement, Surface Area
 &
Volume

Shodor Interactivate: Area Explorer
(Students are shown shapes on a grid after setting the perimeter and asked to calculate areas of the shapes.)

How Many Cubes?
(Calculate how many cubes you need to make the different 3D shapes shown.)

Area & Perimeter
(Visual tutorial of area and perimeter)

MathsNet Interactive Geometry: 3d Volume of a Box
(The volume of a box can be determined by using this applet to manipulate and enumerate unit cubes, rows of unit cubes, or layers of unit cubes.)

MathsNet Interactive Geometry: 3d Nets
(Use the display and the slider to see how shapes up made up from their nets.)

Illuminations:  Cube Nets
(examine various two-dimensional figures to determine which ones can be folded into a cube.)

Unfolding Polyhedra
(examine various three-dimensional figures and view how they unfold into two-dimensional figures.)

Probability

BBC's Maths Files Fish Tank: Probability
(investigate the probability of catching a particular color of fish)

Interactive Mathematics: Probability & Coins
(investigate probability by tossing virtual coins)

Interactive Mathematics: Probability & Spinners
(investigate probability using online spinners)

Shodor Interactivate: Probability
(explore probability with a racing game and one die)