Whole Number Operations
&
Estimation

Canada; Grade 6 Math
(Cool online interactive mathematics activities for many 6th grade math concepts.  Skip Intro and click on "Lessons".)

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).

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

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

Math Goodies: Order of Operations 
(Learn some of the rules for the order of operations.  Evaluate whole-number expressions using the rules learned.  Translate a word problem into an arithmetic expression, and evaluate it using the rules learned.)

Power Lines 1:
(new  twist on number square activities to practice addition of whole numbers and use numerical reasoning skills)

Power Lines 2:
(a little more difficult than Power Lines 1, you need to complete Power Lines 1 and get the password to enter into Power Lines 2)

Power Lines 3:
(a little more difficult than Power Lines 2, you need to complete Power Lines 2 and get the password to enter into Power Lines 3)

Ambleweb: 1 & 2 Step Math Problems
(solve 1 and 2 step equations)

Decimals

Builder Ted
(Place numbers with decimals in order)

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

Decimals: Fast Facts -
(learn how to add, subtract, multiply, divide, and round decimals. Includes 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.)

Science, Optics & You, The Universe Within (Powers of 10)
(Move through space towards the Earth in successive orders of magnitude until you reach a tall oak tree, then begin to move from the actual size of a leaf into a microscopic world that reveals leaf cell walls, into the subatomic universe of electrons and protons.

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

Ambleweb: Totally Mental Math Machine 2
(operations with decimals)

Decimal and Whole Number Jeopardy: 
(practice many types of math operations in a jeopardy style format, for one or two players)

Factors, Primes, Decimals,  Fractions, Ratios & Proportion
 

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

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

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

Fractions-Multiple Activities
(These pages are all about the operations on fractions covered in K8 math courses. Each page has an explanation, interactive practice and challenge games about fractions)

Learning Planet's Fraction Frenzy
(matching equivalent fractions)

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

Eratosthenes' Sieve -
(Click on a number and watch while its multiples are highlighted. Keep choosing numbers until all the prime numbers between 2 and 400 have been discovered.)

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
(Use shadows and a meter stick to measure very tall objects from the ground, buildings, trees and  a Tyrannosaurus Rex.)

Angles, Polygons, Congruency  & Symmetry

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)

Study Works: Playing with Symmetry
(Students explore forms of symmetry.)

Geometry 
&
Measurement

Area & Volume

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.)

Area & Perimeter
(Visual tutorial of area and perimeter)

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

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.)

Interactive Mathematics:  Geoboard
(Use geoboards to illustrate area, perimeter, and rational number concepts)

Geometric Calculator for Circumference, Volume & Area
(Automatically calculates for you.)

Integers,

 Probability,  

 Transformations,

 &
Functions

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

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

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

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: 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.)

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

Interactive Symmetry
(Create objects on a grid and predict the reflection.)

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)

Bobbie Bear - Counting Strategies, Probability
(Bobbie Bear is planning a vacation and wants to know how many outfits can be made using different colored shirts and pants.)

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.)

Interactive Mathematics: Function Machine –
(Explore the concept of functions by putting values into this machine and observing its output)

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

Function Machine
(Solve one and two step problems)