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Comparing Values - Create your own math facts worksheets for comparing values. Problems can include calculations using positive and negative numbers, and two-digit decimal values.
All About Ratios: (Problem Solving) - A famous Texas chef has a secret recipe for her chili. When people ask her for it, she hands them a card with the complete recipe except for 1 detail. For the missing detail, she gives them a clue. Use ratios to discover the missing ingredient.
Percents and Ratios - an index of pages that teach percent and ratio skills covered in K8 math courses - Each page has an explanation, interactive practice and challenge games about percents and ratios. (from AAA math)
Ratio Proportion Calculator - Enter the known and unknown values from your proportion problem. In classic algebraic format, place an x in the box where the value is unknown. Then select Calculate and click on it.
Determine the approximate locations of rational numbers on a number line. 8.1.4 N
Comparing two numbers on a number line from Web Math. Learn how to compare two numbers using a number line. Type each number into the boxes provided, then click "Show Me!"
Line Jumper - FUNBRAIN will show you a number line. Click on the number line at the correct answer. (Be brave, choose Super Brain!)
Number Line Bounce - Instructions on how to play are included at the top of the window.
Martian Math - Answer questions about square roots, and powers of multiplication as you help some not-very-bright aliens repair their ship. [Caution: you must close an ad window between each level of this activity]
Number Cop - select Perfect Squares, click on Start then use the left and right arrows to move the police car to intercept only perfect squares
Square Root Calculator - The Square Root Calculator will find the square root of the number you enter.
Divide fractions - using circles, will show visually how the divisor will fit into the dividend a whole number of times
Dividing fractions - Fraction Bar -This is a very versatile tool that can be used to illustrate a variety of number operations.
EZ Fractions - Add, Subtract, Multiply and Divide fractions - Help tools are on the site to give students every tool necessary for performing operations with fractions as easy as it has ever been!
Percents and Ratios - an index of pages that teach percent and ratio skills covered in K8 math courses - Each page has an explanation, interactive practice and challenge games about percents and ratios. (from AAA math)
Disaster Math - Six sets of interactive word problems: Earthquake Math, Hurricane Math, Tornado Math, Wild Fire Math, Winter Storm Math, and Flood Math.
Estimator - Practice estimation skills by determining the number of objects, length, or area. (parameters: error tolerance)
Fermi Questions Library - Fermi questions use estimation procedures to solve questions like "How many jelly beans fill a one-liter jar?"
More or Less Estimator - Similar to Estimator activity but states a quantity and asks the user to estimate whether the set of objects is more or less than the number given.
Rounding Off - Three levels are available in this game from BBC Education
Word problems - online quiz adding and subtracting fractions
Calculate rates involving cost per unit to determine the best buy. 8.1.9 R
American Grocery Shoppers - Consider the problem of determining a "better buy" when you are shopping for canned tomatoes. (an interesting perspective on unit cost)
What's for Lunch? Pizza Cost Comparison - Visit the Internet Pizza Server and compare costs for different combinations of toppings and pizza sizes. You will also have the opportunity to create and "order" a pizza of your choice.
Use exponential, scientific, and calculator notation to represent large numbers in real-world situations. 8.1.10 N
Exponent Practice - Try a workout of 10 problems. If you get at least 8 correct on your first attempt, then you're ready to move on. If not, review "In Depth" and try again.
Scientific Notation - Why your wrist (or keyboard) will thank you for not writing all those zeros.
Simplifying - Expressions that have had their like terms combined. Match each expression on the left with an expression on the right. Type the letter of the correct expression in the box.
Apply order of operations in computing with rational numbers using no more than two parentheses and exponents 1 and 2. 8.1.11 N
Order of Operations - Try a workout of 10 problems. If you get at least 8 correct on your first attempt, then you're ready to move on. If not, review "In Depth" and try again.
Mystery Operations - In this activity the computer makes up a mystery operation, and you have to figure out what the operation is. You give the computer two numbers to calculate, and it tells you the answer.
Number Cracker - guess what number comes next in the pattern
Power Lines - (math reasoning) Place numbers in the circles so all lines add to the same target number. You must get all correct to get the password to go on to the next level. level 2 | level 3
Disaster Math - Six sets of interactive word problems: Earthquake Math, Hurricane Math, Tornado Math, Wild Fire Math, Winter Storm Math, and Flood Math.
Ms. Lindquist: The Tutor - A free, web-delivered, intelligent tutoring system for tutoring students in writing expressions for algebra word problems. This site is sponsored by NSF.
Solving Math Word Problems - A Study Guides and Strategies web site posted by the University of St. Thomas
Translating Word Problems - The hardest thing about doing word problems is taking the English problem and translating it into math. A lesson from Purplemath, a great Algebra resource.
Word Problems For Kids - This is a set of carefully selected problems (grade 5 to Grade 12) which can help you improve your problem solving skills.
Connect symbolic expressions and graphs of lines. 8.2.4 GR
Generate equivalent forms for simple algebraic expressions. 8.2.5 AT
Solve one- and two-step linear equations involving integers. 8.2.6 AT
Linear Equation Solver - a pop-up window allows users to specify the number of equations
Rags to Riches Game - a fun practice for 1-step, 2-step and multi-step equations. The game is similar in nature to "Who Wants to Be a Millionaire"
Solving addition and subtraction equations - Try a workout of 10 problems. If you get at least 8 correct on your first attempt, then you're ready to move on. If not, review "In Depth" and try again.
Interpret graphs which represent rates of change. 8.2.8 GR
Exploring Baby Weight Mathematically - A baby's weight changes dramatically in the first weeks of life. For example, students will look at data for Baby Kevin and Baby David.
Connect the appropriate graph to a linear equation. 8.2.11 GR
Algebra vs the Cockroaches - determine the slope of the line that cockroaches are crawling along to destroy them
Equation of a Line: Slope-Intercept Form - An interactive applet that will help you visualize how changing the values for the slope, m, and the y-intercept, b, will affect the graph of the equation y = mx + b.
Use ordered pairs to describe given points in a coordinate system. 8.3.2 GR
Catch the Fly - [all 4 quadrants are used] Use the keyboard to enter the x and y values of an ordered pair to help the fly catch a bug. No score is kept, each question is essentially a one question game.
General Coordinates Game - Students investigate the Cartesian coordinate system through identifying the coordinates of points, or requesting that a particular point be plotted.
Simple Coordinates Game - Students investigate the first quadrant of the Cartesian coordinate system through identifying the coordinates of points, or requesting that a particular point be plotted.
Simple Maze Game - Students investigate the first Quadrant of the Cartesian coordinate system by directing a robot through a mine field laid out on the plane.
Simple Maze Game - Students investigate the first quadrant of the Cartesian coordinate system by directing a robot through a mine field laid out on the plane.
What's the Point? - a coordinate plane game from Funbrain.com (use the hardest level)
Worksheet Generator - Print your own blank coordinate plane worksheets, you determine the number of grids on a sheet and whether the grids are numbered or not.
Identify relationships among the angles (i.e., complementary, supplementary, interior, exterior, vertical, and corresponding). 8.3.3 G
Complementary Angles - Match the angles that are complementary. (a Quia game available in Matching, Flashcards, and Concentration format)
Geometric Terms - this Quia quiz contains four activities - matching, flash cards, concentration, and a word search puzzle - which reinforce students vocabulary concerning angles.
Introduction to Angles - Basic terms related to the classification of angles (a Quia game available in Matching, Flashcards, Word Search, and Concentration format)
Apply spatial reasoning and visualization to solve real-world problems. 8.3.7 R
3-D Object Viewer - Students may explore a variety of 3-D objects and their accompanying 2-D views.
Building Houses with Side View - student constructs a block figure (dynamic, perspective drawing) to match (10 different figures)
Coloring 3-D sides - [UK spelling on this site] Find the red sides shown in a series of 2-D drawings and click on the right face of the 3-D model to color it red. 20 questions
Coloring 2-D sides - Use the colored portion of the 3-D object to color the correct side of the 2-D drawing.
Cube - Find out which colors will be on opposite faces of a cube whose faces are shown unfolded.
Guess the View - Students are given a 3-D view of an object, and then given a 2-D view of the object. Students must choose which of 6 views is being displayed from a list.
Plot Plans and Silhouettes - from Shape and Space in Geometry - the student task is to come up with plot plans that could match the given silhouettes. Background information is available at another page.
Quick Images - In the following Interactive Activity, you'll stretch both your visualization and drawing muscles. (click on Show Shape to begin the activity)
Rotating Houses - Students are presented with a 3-D figure created with blocks that can be rotated and flipped using a mouse. The figure must be rotated until it matches a 2-D representation of one of the views.
Apply geometric ideas and relationships in areas outside the mathematics classroom (i.e., art, science, and everyday life). 8.3.8 R
Geometry and Art - Using the collection of the Indianapolis Museum of Art as a guide, What's the Problem explores the way geometry is used as a creative tool in the work of several artists.
Solve problems using angle relationships (i.e., complementary, supplementary, interior, exterior, vertical, and corresponding). 8.3.9 G
Angles - Students practice their knowledge of acute, obtuse and alternate angles.
Pythagorean Explorer - Students find the length of a side of a right triangle by using the Pythagorean Theorem, and then check their answers.
Squaring the Triangle - Students learn about how the Pythagorean Theorem works, through investigating the standard geometric proof. Parameters: Sizes of the legs of the triangle.
Triangle Explorer - Students learn about areas of triangles and about the Cartesian coordinate system through experimenting with triangles drawn on a grid.
Select units of appropriate size and type to measure angles, perimeter, area, surface area, and volume. 8.4.1 ME
A Dictionary of Units - This provides a summary of most of the units of measurement to be found in use around the world today (and a few of historical interest), together with the appropriate conversion factors needed to change them into a 'standard' unit of the SI.
Interactive Units Converter - Here you will find interactive calculators for many measurement systems both commonly used like metric and U.S. Avoirdupois and quite exotic like Ancient Greek and Roman.
Measure converter - Full Conversion Table (sorted by Measure Unit Name)
Measure4measure - a collection of interactive sites on the web that estimate, calculate, evaluate, translate etc. In other words, they do the work for you.
Interactive Proof of Pythagoras' theorem - This Java applet was written by Jim Morey. It won grand prize in Sun Microsystem's Java programming contest in the Summer of 1995.
Solving a right triangle - This example illustrates how finding the height of the pyramid is equivalent to solving the right triangle. The virtual reality media can help students visualize the interrelation between the 3-dimensional pyramid and the 2-dimensional right triangle.
Using the Pythagorean Theorem Once you know the equation a2 + b2 = c2 is true, then you can use it to solve all kinds of problems. Try the Pythagorean theorem with two other examples given on this page.
Leap Frog - Students design an experiment to answer a question, collect information, and interpret the results using charts. (Author - Michaél Dunnivant)
Exploring Histograms - The interactive data analysis tool in this investigation allows students to create their own sets of data and examine how various statistical functions such as mean, median, and standard deviation depend on the choice of data.
Medians - Students understand and apply the concepts of median and mean. (Author - Michael Naylor)
Connect data sets and their graphical representations (i.e., histograms, stem-and-leaf plots, box plots, and scatter plots). 8.5.4 DP
Box Plot - explanation from the Engineering Statistics Handbook
Box Plot - comparing the average height of singers
Make conjectures and predictions based on data. 8.5.5 GR
Adjustable Spinner - Students can create a game spinner with variable sized sectors to look at experimental and theoretical probabilities. Parameters: Sizes of sectors, number of sectors, number of trials.
Adjustable Spinner - Change the number of sectors and increase or decrease their size to create any type of spinner. Then, conduct a probability experiment by spinning the spinner many times. How does the experimental probability compare with the theoretical probability
Data Interpretation Games - Numerous activities on using and interpreting data - Activities include bar, pie and line graphs, data collecting and much more
Fun and Sun Rent-a-Car - students use tables, graphs, linear functions to solve a real-world problem
Graphing Skills - What's the point? Find the point on the grid
Marbles - Students learn about sampling with and without replacement by modeling drawing marbles from a bag. Parameters: Number and color of marbles in the bag, replacement rule.
Practice with Data - answer questions pertaining to collecting and organizing data
Spinner - Students can create a game spinner with one to twelve sectors to look at experimental and theoretical probabilities. Parameters: Number of sectors, number of trials.
Two Colors - Students choose between three boxes and choose one marble from the box to look at conditional probabilities. Parameters: Number of trials.
Understanding Experimental Probability - Experiment with experimental probability using a fixed size section spinner, a variable section spinner, 2 regular 6-sided number cubes or design your own number cubes.
The Winning Edge: Probability in Basketball - Time has run out in the big basketball game, and the score is tied. However, Up-State College has the ball with time out. You're the coach. Which players should you put into the game to give you the best chance of winning? (students collect data and make prediction based on the data)
Connect the symbolic representation of a probability to an experiment. 8.5.6 DP
Coin Flipping page - flip up to 100 coins and see the total number of heads and tails. Excellent for teaching about probability.
Hand Squeeze - (a data collection and analysis class experiment) - Pass a "hand squeeze" around a circle and measure the amount of time that it takes for the hand squeeze to complete the circle.
Probability Theory: The Layman's Guide to Probability - An in-depth but easily readable guide on probability theory, covering various aspects of the theory with a bias to gambling games and strategies. Includes working examples in an excel spreadsheet.
What are Your Chances - What many people refer to as 'good luck' can actually be explained by a little knowledge about probability and statistics. Our dice game allows you to see how increasing or decreasing the number of dice rolls effects an outcome.
Determine the mean or median of a given set of real-world data. 8.5.7 - median DP
Bicycles Ala Mode - Students understand and apply the concepts of mean, median and mode. (Author - Michael Naylor)
Exploring Histograms - The interactive data analysis tool in this investigation allows students to create their own sets of data and examine how various statistical functions such as mean, median, and standard deviation depend on the choice of data.
Recognize misleading presentations of data. 8.5.8 DP
Eighth Grade Math - Read each question and choose the best answer. Then mark the circle next to the letter for the answer you have chosen. (from Texas)
Junior High Math Interactives - includes interactive math activities, print activities, learning strategies, and videos that illustrate how math is used in everyday life.
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