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1. Comparing Seven Digit Numbers - practice area followed by an interactive game
2. Rational and Irrational number review

1. Rational Number and its Reciprocal - a step-by-step examination of a problem by Dr. Math
2. How do I find the reciprocal of a decimal mixed number? - an answer to a student's question

1. Factoring Trinomials - practice exercises at Math Pinball
2. Factoring Trinomials Self Quiz - Check your knowledge about factoring polynomials.
3. Interactive Algebra Review - Multiplying Algebraic Expressions
4. Interactive Algebra Review - Solving Polynomial Equations (see also part B of this tutorial)
5. Multiplying Polynomials - a step-by-step explanation from PurpleMath
6. Solving Polynomial Equations - In algebra you spend lots of time solving polynomial equations or factoring polynomials (which is the same thing). This paper ties them all together in a coherent whole.

1. A concentration type game from Quia using algebraic expressions - If d = 2 match the algebraic expressions to the correct answers.
2. Interactive Algebra Review - Rational Algebraic Expressions

1. Absolute Value lesson from Purple Math
2. Simplifying Basic Absolute Value Expressions - practice exercises at Math Pinball
3. Solving Absolute Value Equations - a lesson from Purple Math

1. Converting Numbers to Scientific Notation - AAA Math lesson and practice problems &
2. Interactive Algebra Review on Integer Exponents
3. Evaluating Exponents of Negative Numbers - AAA Math lesson and practice problems &
4. 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.
5. Exponents - Unit 3 from Ms. Glosser's Math Goodies
6. Scientific Notation - interactive practice
7. 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.
8. Use the Equation Calculator from Algebra Help

1. 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.
2. 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.
3. Learn to solve word problems - This is a collection of word problem solvers that solve your problems and help you understand the solutions.
4. Solving Equations - illustrates the process of solving equations of various forms (from SOS Math)

1. Solving Equations - illustrates the process of solving equations of various forms (from SOS Math)
2. Solving Simple Linear Equations with Integer Coefficients - practice exercises at Math Pinball
3. Solving More Complicated Linear Equations with Integer Coefficients - practice exercises at Math Pinball

1. Algebra vs the Cockroaches - determine the slope of the line that cockroaches are crawling along to destroy them
2. 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.
3. Slope Intercept Jeopardy review game in the form of a PowerPoint show
4. Another Slope Intercept Jeopardy review game in the form of a PowerPoint show

1. Number Line Bounce - use all the arrows to bounce back and forth along the number line to reach a target number
2. Visualizing Numbers on an Interactive Number Line - instructions for using this activity are included

1. Calculating the nth Term - how to develop a formula that can be used to calculate these terms

2. Multiple-Choice Questions – twenty (20) questions on Patterns & Functions

1. Solving Simple Linear Equations with Integer Coefficients - practice exercises at Math Pinball
2. Solving More Complicated Linear Equations with Integer Coefficients - practice exercises at Math Pinball

1. Simplifying Radical Expressions - Intermediate Algebra tutorial
2. Simplifying Radicals - explanation and practice problems

1. Properties of Logarithms from SOS Math
2. College Algebra - a tutorial on Logarithmic Properties with several examples and practice problems
3. Basic Log Rules from Purple Math

1. Exponential functions - a review of logarithms from SOS Math
2. Inverse, Exponential and Logarithmic functions - five practice problems from Spark Notes

1. Animated Proof of the Pythagorean Theorem
2. Demonstrate the Pythagorean Theorem - from NOVA
3. 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.
4. Nineteen Pythagorean Theorem applets
5. Pythagorean theorem - In this session, you will look at a few proofs and several applications of one of the most famous theorems in mathematics
6. Proof of the theorem is demonstrated through a Quicktime animation
7. Pythagorean Theorem - a java applet that allows students to investigate this theorem
8. Pythagorean Theorem - This lesson will allow you to figure out the Pythagorean Theorem all by yourself.
9. Pythagorean Theorem and its many proofs (43 to be precise)
10. The Pythagorean Theorem, Distance Formula and Intro to Trigonometry - other practice activities
11. 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
12. Pythagorean Theorem - In this investigation students will learn more about the Pythagorean Theorem and see whether or not it works for triangles that are not right triangles.

1. Geometry Java Applets - Similar Figures
2. A Mathematical Droodle - Two Triples of Similar Triangles
3. Percent and Proportion - unit 10 from Ms. Glosser's Math Goodies
4. Plane Math - Nine activities involving aviation and mathematic
5. Proportional Thinking and Probability - here you will find the Customizable Proportion Problems and much more
6. Ratio and Proportion - four stage lesson includes examples and a set of workout problems
7. Virtual Manipulative - Similar Triangles

1. Determining The Height Of A Waterfall - In research on waterfalls often the most confusing aspect has been determining the true height of a waterfall.
2. How to use the distance formula to find distances between (x,y) points
3. Object Height Calculator - Use the SCSA Object Height Calculator to calculate the height of tall shadow-casters, e.g., buildings, flagpoles, utility poles, trees, etc.
4. Out of the Shadows: The Problem of Slopes - Knowing the sun's elevation is not enough to determine the height of an object from the length of its shadow; the slope of the surface on which the shadow is being cast must also be known.
5. Measured Altitude of a Model Rocket - a simple way to determine the maximum altitude the rocket reaches at the end of the coasting flight
6. Measured Altitude of a Kite - a simple way to determine the altitude of a flying kite

1. Lesson on Circumference of a Circle - a quiz is included at the bottom of the page
2. Lesson on the Area of a Circle
3. Circle, Sphere & Cylinder Calculator

1. Connecting Equations to Real-World Situations
2. Graphs and charts - four different graphs and charts for you to consider
3. Math in Daily Life: How do numbers affect everyday decisions? - A unit from Annenberg CPB which includes several hands-on activities.
4. Moneyopolis - A challenging math game, which requires you to demonstrate your math skills in the context of some real life money matters. Created by the national accounting firm Ernst & Young (free registration required)
5. Plane Math - Nine activities involving aviation and mathematic
6. Real World Mathematics - One of the challenges facing mathematics teachers is convincing their students that there is a place for mathematics in the real world. The goal of this page is to collect examples of those applications. This is a SCORE (Schools of California - Online Resources for Educators) page.
7. Using Data and Statistics - good graphs, however they are not interactive
8. Fun and Sun Rent-a-Car - students use tables, graphs, linear functions to solve a real-world problem
9. 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.
10. What Percentage of your Class is Right or Left Handed? - a data collection and analysis class experiment
11. 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.

1. Central Tendency - explanation of this concept and related concepts
2. Measures of Central Tendency - tutorial and examples
3. Measuring Central Tendency - explanation, examples and a large number of links to related topics
4. Running and Weighted Averages - tutorial and examples

1. Analyzing Blood Pressure with Scatter Plots (Best-fitting Line) - lesson plan (Algebra 1)
2. Creating an Excel XY (Scatter) Plot - simple explanation
3. Creating a Scatter Plot in Excel - two elaborate examples of scatter plots; Beer's law scatter plot and linear regression, and creating a scatter plot of titration data
4. Explanation of Scatter Plots from the Engineering Statistics Handbook
5. Scatter Plot Applet - This applet draws a scatter plot of points (a,b), where the data is taken from an input table. The table is on the left side of the applet and can be edited by the user.
6. Using Excel to create a Scatter Plot - an Internet4Classrooms module
7. Weather and Spreadsheets - Java applet which allows you to enter data and display a scatter plot or a column chart of the data entered

1. Probabilistic Situations - a short slide show on the topic
2. 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.
3. Coin Flipping - Click the Flip Coin button. Number of flips, number of heads, and probability of flipping heads is displayed. (one click per flip)
4. Ken White's Coin Flipping page - flip up to 100 coins and see the total number of heads and tails. Excellent for teaching about probability.
5. Interactive Probability Tutorials: Sample Spaces and Events, Estimated Probability, Empirical Probability, Abstract Probability and Conditional Probability and Independence
6. 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.

1. see a list above

1. Finding Data on the Internet - You'll soon be checking facts and downloading reputable data on everything from public safety to education to agriculture to crime to economics ... you name it. This site is intended as a resource for journalists, but why not make this a source for projects. Your students can find raw data related to: aviation, demographics, weather, energy, health, immigration and more.
2. List of Data Sources on the Internet4Classrooms Project page
3. Review of tables, charts and graphs - an index of topics
4. Using Graphs, Equations, and Tables to Investigate the Elimination of Medicine from the Body - This three-part example illustrates the use of iteration, recursion, and algebra to model and analyze the changing amount of medicine in an athlete's body.

1. SOS Mathematics - Algebra lessons
2. 28 E-Lab Activities for eighth grade level mathematics from Harcourt School Publishers
3. AAAMath offers a large number of math review topics, each one supported by an interactive practice page (8th grade level)
4. Practical Algebra Lessons from PurpleMath - The lessons give practical tips, hints, and examples, and point out common mistakes.
5. National Library of Virtual Manipulatives - Virtual manipulatives related to the NCTM Number & Operations standard. (9-12 at the bottom of the page)
6. Practice Tests from Virginia State Standards of Learning - Select Algebra I or II, and then select 10, 20, or 40 questions.
7. Algebra Help - in-depth algebra help through algebra history, an online textbook, and various articles covering everything from basic algebra fundamentals to the latest-and-greatest algebra software help available