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7th grade TN Math Standards  - 2009-2010 Implementation

Resources for Older Standards
Mathematical Processes | Number & Operations | Algebra | Geometry & Measurement | Data Analysis, Statistics, and Probability | Review Help
Links verified 10/31/07
Return to Grade Level Skills
Worksheet Generator - This web site will allow you to create printable math worksheets from your browser.
(addition, subtraction, multiplication, division, mixed problems, fractions, measurement, fractions, graphing, telling time, and a one-hundred chart)

a site for teachers | a PowerPoint show | Adobe Acrobat document | a Word document sound | video format | interactive lesson | a quiz | lesson plan | to print

1. Common Mathematics Abbreviations - Abbreviations.com has almost 1500 mathematics abbreviations
2. Common Math Abbreviations and Symbols - a one page MS Word document with a second page for students to write new abbreviations as you teach them
3. Common Math Symbols and Abbreviations - a six page document
4. Some Common Mathematical Symbols and Abbreviations (with History) - a four page document which includes latin terms

1. Estimating by Rounding - Addition with regrouping - instruction and review, practice, and a quiz &
2. Estimating by Rounding - Subtraction with regrouping - instruction and review, practice, and a quiz &
3. Round About - [this link opens in a new window] estimate by rounding. (Author - Sandi King)
4. Rounding Off - Three levels are available in this game from BBC Education
5. Spy Guys Interactive - Rounding Numbers - Click Skip Intro, then select Lessons, and then click on Lesson 9

1. Fermi Questions Library - Fermi questions use estimation procedures to solve questions like "How many jelly beans fill a one-liter jar?"
2. Comparison Estimator - Similar to Estimator but compares two sets of objects.
3. Disaster Math - Six sets of interactive word problems: Earthquake Math, Hurricane Math, Tornado Math, Wild Fire Math, Winter Storm Math, and Flood Math.
4. Estimating Sum - No hints or clues given - instruction and review, practice, and a quiz &
5. Estimation Strategies - several strategies are discussed
6. Estimator - Practice estimation skills by determining the number of objects, length, or area. (parameters: error tolerance)
7. Fermi Questions Library - Fermi questions use estimation procedures to solve questions like "How many jelly beans fill a one-liter jar?"
8. How Big are Things - a printable cube to be used in making size estimations [several versions]
9. How to Simplify a Number - part of being approximate is simplifying numbers
10. 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.
11. Pinocchio estimation game - suggested game for developing the skill of estimation
12. Scaling the Universe to Your Desktop - estimating size
13. Weigh the Wangdoodles - Your job is to find the weight of each Wangdoodle using the information provided by the scales. To be successful, you will have to make sure that the weight you assign to each Wangdoodle works on each scale. This activity is a fun but challenging introduction to multiple algebraic equations.
14. Word problems - online quiz adding and subtracting fractions
15. Your Body as a Ruler - a user's manual

1. Algebra: Proportion Word Problems - explanation and examples [direct and inverse proportion explained]
2. Cat and Mouse: Direct and inverse proportion - The problem is actually a great opportunity to teach direct variation and inverse variation.
3. Inverse Proportion - this explanation provides a clearly explained example
4. Inverse Proportion - this 18 slide show has several examples
5. Inverse Proportion Problems - from Annenberg's Learning Math series
6. Math Word Problems [Variation or Inverse Proportion] - eight question multiple choice quiz
7. Proportionality (mathematics) - this Wikipedia article explains direct and inverse proportion
8. Ratio, proportion and percentages [inverse proportion] - explanation, one example, and three practice problems
9. Some Inverse Proportion Problems - all about how one change causes another [a 2 page MS Word document]

1. Algebra: Proportion Word Problems - explanation and examples [direct and inverse proportion explained]
2. Direct Proportion - this explanation provides a clearly explained example
3. Direct Proportion - explanation and practice problems [Caution: metric units and UK monetary units used]
4. Direct Proportion - this 18 slide PowerPoint show has several examples
5. Direct Proportion - a 37 slide PowerPoint show with several "starter questions"
6. How to Determine Whether Two Variables Are Directly Proportional - explanation and several graphs
7. Math Word Problems [Direct Variation or Direct Proportion] - eight question multiple choice quiz
8. Ratio, proportion and percentages [direct proportion] - explanation, two examples, and two practice problems
9. Solving Problems Involving Direct Proportion - [close the subscription screen to get to the problems] some good practice problems are presented here, UK units used
10. Solving Proportion Problems - four examples with detailed explanation

1. How to Use the Slope Intercept Form (in Algebra) - explanation from Wiki How-to
2. Learning about Rate of Change in Linear Functions Using Interactive Graphs - lesson plan from NCTM
3. The Meaning of Slope and y-Intercept in the Context of Word Problems - explanation from Purple Math
4. Writing Equation of a Line - [short opening promo included] video lesson from YourTeacher.com

1. How to read a map - Several activities are presented to assist in teaching the concepts of reading maps.
2. Index of topics and quizzes offered by David J. Leveson at CUNY in Brooklyn, NY
3. Latitude and Longitude quiz - online quiz that checks answers
4. Map Reading Activities - practice reading maps using compasses, latitude, longitude and more
5. Mathematics of Cartography - several map activity from Cynthia Lanius
6. National Atlas of the United States [this link opens in a new window]
7. Reading Map Symbols - identify symbols with words
8. What’s On a Map? - eight questions about using various parts of a map

1. Applications of Culture in Mathematics - [NCCTM lesson plan] Students will use the concepts of similarity, scale factors, and conversion factors to make scale drawings of different Malawian houses
2. Designing a Soccer Field - lesson plan using scale drawings
3. Designing a Tennis Court - lesson plan using scale drawings
4. Drawing Scale in CAD - summarizes the relationship between drawing scale and drawing scale factor and describes how to work with them in new and existing drawings
5. I Can Solve Problems Using Scale Drawings! - an 18 slide PowerPoint show
6. Pictures to use in scale factor activities - Yankee Stadium - Orange Bowl Stadium
7. Scale Drawings - explanation and two practice problems
8. Scale Drawings and Scale Models - a 17 slide PowerPoint show could be used as a lesson
9. Teaching Idea - Use Google Maps to find a picture of an object of known size and from that, the size of other objects nearby. Example: At Wikipedia I found length of a side (each side is 591 ft) and the map coordinates for the Pyramid at Memphis, TN (35° 9′ 21.03″ N, 90° 3′ 7.49″ W). I then used Google Maps to locate an aerial image of the area and estimated the length of a string of barges in the Mississippi River to be 1740 ft.

1. Brian P. Cleary - author of books conveying math ideas - Mission of Addition, The, Action of Subtraction, The, How Long or How Wide?: A Measuring Guide
2. Children's Picture Book Database at Miami University - type in math or numbers in the search box.
3. Flatland: A romance of many dimensions - fifty-five pages if printed
4. Literature for Learning Math Concepts - using books to teach math
5. Note of Caution: the books below are not available to read online, they are given as a reading list only
   1. Fiction about Math - a 3 page reading list in MS Word format
   2. Math Month in the Library - article about books to consider
   3. Math Novels - use this list of novels as a reading list rather than a shopping list
   4. Math and Science Related Books - a reading list from Math Forum
   5. Mathematical Fiction - large database of titles
   6. Mathematics fiction books - Wikipedia index to articles about 19 books
   7. Mathematics in Fiction - a reading list of novels in which mathematics play a large role

1. Activities at Illuminations - Illuminations has 100 online activities available. Select which types of activities you’re looking for, and click Search.
2. Base 10 Blocks - virtual manipulative
3. Colored Chip Models - use manipulatives to model addition, subtraction, multiplication, and division with positive and negative integers [includes two practice problems]
4. Electronic Examples - index of manipulatives from NCTM
5. GeoBoard - this two-part example describes activities that use interactive geoboards
6. Integer Bars - learning fractions and more with on-line manipulatives
7. Math Playground - a small but growing collection of manipulatives for teaching and learning
8. National Library of Virtual Manipulatives - sixteen Algebra manipulatives for grades 6-8 [More topics and grade levels available at the NLVM home page]
9. Pattern Blocks Program - use tools to solve a variety of problems
10. Tangrams - interactive geometric site
11. Virtual Manipulatives - a list of various manipulatives for grades 1-6
12. Wolfram Demonstrations Project - a free resource of interactive visualizations from elementary education to the frontiers of research

1. Calculating with Scientific Notation - explanation, several examples and links to a large number of worksheets at the bottom of the page
2. Converting Numbers to Scientific Notation - AAA Math lesson and practice problems &
3. Converting Standard Numbers to Scientific Notation - instruction and review, practice, and a quiz &
4. Converting from Scientific Notation to Standard Numbers - instruction and review, practice, and a quiz &
5. Comparing Scientific and Standard Notation Numbers - instruction and review, practice, and a quiz &
6. Converting Decimal Numbers to Scientific Notation - instruction and review, practice, and a quiz &
7. Converting from Scientific Notation to Decimal Numbers - instruction and review, practice, and a quiz &
8. Converting Fractions to Scientific Notation - instruction and review, practice, and a quiz &
9. Cube of a Number - AAA Math lesson and practice problems &
10. Division Using Scientific Notation - - two examples and seven practice problems
11. Evaluating Exponents of Negative Numbers - AAA Math lesson and practice problems &
12. Exponential Expressions - find the exponential expression that is equivalent to the number given
13. 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.
14. Exponents - Unit 3 from Ms. Glosser's Math Goodies
15. Interactive Algebra Review on Integer Exponents
16. Multiplication and Division Problems Using Scientific Notation - two examples and seven practice problems
17. Multiplication in Scientific Notation - four examples and seven practice problems
18. Practice with Scientific Notation - Pencil and paper may be needed - (answers provided)
19. Scientific Notation - explanation from New York University's MathMol page
20. Scientific Notation - Why your wrist (or keyboard) will thank you for not writing all those zeros.
21. Scientific Notation - interactive practice
22. Scientific Notation Problem Generator - either the scientific notation or standard notation representation of a number will be shown. Put the corresponding value(s) in the empty cell(s) and press "Check Answer".
23. Scientific Notation Quiz - ten multiple choice questions
24. 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.
25. Symbols of Inclusion - simplify each expression and choose the correct comparison symbol
26. What Is Scientific Notation And How Is It Used? - explanation and several practice problems, answers given on another page

1. All About Ratios - a Quiz
2. All About Ratios - links to several lessons by Cynthia Lanius
3. 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.
4. Comparing Ratios and Rates - online quiz
5. Determine the number based on the ratio - instruction and review, practice, and a quiz &
6. Determining the Ratio - instruction and review, practice, and a quiz &
7. Figure This: Math Challenge for Families - proportional reasoning
8. The Importance of Ratios and Proportions - this comes under the heading of a perfect answer to "Why do I have to learn this?" - how a stock market trader benefits from ratio and proportion
9. Interpreting and Applying Proportions - online quiz
10. Learning ratios and proportions through scale drawings - a text lesson plan
11. Math for Morons Like Us - a ThinkQuest entry on ratio
12. Nutshell Math: Ratios and Proportion - video lesson with examples and sample problems
    1. You Tube video of the same lesson - Instructor: Ms. Jenkins
13. Percentages and Proportions - online quiz
14. 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) - instruction and review, practice, and a quiz &
15. Percent with a Calculator - after the lesson there are problems to work
16. Practice with Ratios - online quiz
17. Proportion Practice Test - thirteen multiple choice questions
18. Proportions and Ratios - good explanation of means and extremes from Free Math
19. Rags to Riches: Ratio and Proportion Quiz - [this link opens on a new page] quiz at Quia
20. Rates, Ratios, and Proportions - [this link opens on a new page] a two person quiz from Quia
21. Ratio/Proportion Problems from Ask Dr. Math - three pages of links to real-world problems
22. Ratio & Proportion - math review practice exercises
23. Ratio & Proportion - A proportion is a name we give to a statement that two ratios are equal. (This is a 3 step lesson followed by a workout.)
24. Ratio and Proportion - explanation and examples
25. Ratio and Proportion - introduction, in depth explanation, examples and a workout of ten problems
26. Ratio and Proportion Quiz - play this game to practice writing ratios
27. Ratio Exercises: Dolls : Camera] | Same ratio -- Fish : Atom | Different ratio -- Spider : Lizard | Different ratio -- Dots : Stars | 2 Dolls for every 1 Camera | 3 Atoms for every 2 Fish | [How Many Spiders do You Have? | Which Way Gives More Pizza?
28. 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.
29. Ratios - a six page module from Purple Math
30. Ratios and Proportions - explanation with four sample problems
31. Ratios and Proportions - an interactive lesson in a slide show format
32. Ratios and Proportions - an 18 slide PowerPoint show
33. Ratios and Proportion Review - a 12 slide PowerPoint show
34. Review of Proportion - examples and practice problems
35. Review of Ratios - examples and practice problems
36. Skillwise: Ratio and Proportion - five part module; fact sheet, game, quiz, activity and worksheet
37. Spy Guys Interactive - Ratio - Click Skip Intro, then select Lessons, and then click on Lesson 3
38. Teaching Ratios and Proportions - suggestion for teachers and parents
39. Using Proportions - online quiz

1. Button Beach - use logic to determine the value of rows of buttons, three levels of challenge
2. Calculating the nth Term - how to develop a formula that can be used to calculate these terms
3. Create your own pattern - drag shapes to create a pattern
   1. Instructions on how to use this page in your classroom
4. 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.
5. Number Cracker - [this link opens on a new page] guess what number comes next in the pattern
6. Patterns in Geometry - online quiz
7. Patterns - Figure out the patterns, if you can!
8. 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
9. Writing Rules for Patterns - online quiz

1. Area Model of the Distributive Property - a TeacherTube video [2:18]
2. Area Models for Multiplication and Division - an Annenberg lesson plan from their Learning Math series
3. Basic Number Properties: Associative, Commutative, and Distributive - explanation from Purple Math
4. Commutative Property - addition and multiplication properties are explained using an animated image
5. Commutative Property - explanation and examples
6. Commutative & Associative Properties - this PowerPoint show includes a ten question quiz with answers
7. Commutativity - the ability to change the order of something without changing the end result [Wikipedia]
8. Distributive Property - uses animated images to help explain the property
9. Distributive Property - short animation that loops
10. Distributive Property - five slide PowerPoint show which uses animation very effectively
11. Number Properties - from Online Math Learning
12. Use the distributive property to simplify numerical and variable expressions - an eleven slide PowerPoint show which use animation effectively to teach the concept
13. Which Property - quiz in the form of a PowerPoint show

1. Calculate percent - Discover relationships between fractions, percents, and decimals
2. Equivalent Fractions and Decimals - decide which answer will balance the scale
3. Finding a percent of a quantity - online quiz
4. Fractions, Decimals or Percent - two are given, you supply the third
5. Percents and Wholes - online quiz
6. Percent Game - [this link opens in a new window] FunBrain site [these are difficult]
7. Practice Solving Percent Problems - more percent practice
8. 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)
9. Percent Problems - [Caution: if the answer is a percent, the percent sign must be typed or the answer will be considered wrong.] a one-player, or two-player Jeopardy-type game from Quia [this link opens in a new window]
10. Ratio and Proportions: Similar Figures - a four part lesson including problems to work
11. Shopping at Troy's Toys - percent shopping
12. Solving Percent Problems Using a Pyramid Grid - [this link opens in a new window] an interactive lesson
13. Spy Guys Interactive - Solving Problems with Decimals - Click Skip Intro, then select Lessons, and then click on Lesson 5
14. Spy Guys Interactive - Improper Fractions & Mixed Numbers - Click Skip Intro, then select Lessons, and then click on Lesson 2
15. Spy Guys Interactive - Percent - Click Skip Intro, then select Lessons, and then click on Lesson 4
16. Using percents - online quiz
17. Using the Proportion Method to Solve Percent Problems - practice problems at the end

1. Interest Worksheets from EdHelper
   1. All 1 year, only calculate Interest
   2. All 1 year, calculate interest and total payments
   3. Fractional Years and Decimal Rates
   4. Less than one year (30, 90, .. 300 days)
   5. Mixed Table with All of the Above!
   6. Interest Word Problems (Difficult)

1. Comparison Estimator - Similar to Estimator but compares two sets of objects.
2. Disaster Math - Six sets of interactive word problems: Earthquake Math, Hurricane Math, Tornado Math, Wild Fire Math, Winter Storm Math, and Flood Math.
3. Estimating by Rounding - Addition with regrouping - instruction and review, practice, and a quiz &
4. Estimating by Rounding - Subtraction with regrouping - instruction and review, practice, and a quiz &
5. Estimating Sum - No hints or clues given - instruction and review, practice, and a quiz &
6. Estimation Strategies - several strategies are discussed
7. Estimator - Practice estimation skills by determining the number of objects, length, or area. (parameters: error tolerance)
8. Fermi Questions Library - Fermi questions use estimation procedures to solve questions like "How many jelly beans fill a one-liter jar?"
9. How Big are Things - a printable cube to be used in making size estimations [several versions]
10. How to Simplify a Number - part of being approximate is simplifying numbers
11. 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.
12. Pinocchio estimation game - suggested game for developing the skill of estimation
13. Round About - [this link opens in a new window] estimate by rounding. (Author - Sandi King)
14. Rounding Off - Three levels are available in this game from BBC Education
15. Scaling the Universe to Your Desktop - estimating size
16. Spy Guys Interactive - Rounding Numbers - Click Skip Intro, then select Lessons, and then click on Lesson 9
17. Weigh the Wangdoodles - Your job is to find the weight of each Wangdoodle using the information provided by the scales. To be successful, you will have to make sure that the weight you assign to each Wangdoodle works on each scale. This activity is a fun but challenging introduction to multiple algebraic equations.
18. Word problems - online quiz adding and subtracting fractions
19. Your Body as a Ruler - a user's manual

1. How to Simplify a Number - part of being approximate is simplifying numbers
2. Symbols of Inclusion - simplify each expression and choose the correct comparison symbol

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

1. Simplifying Radical Expressions - Intermediate Algebra tutorial
2. Simplifying Radicals - basic information about perfect square numbers
3. Simplifying Radicals - explanation and practice problems

1. Number & Operations [Grades 6 - 8]

1. Algebra - Fun with Calendars
2. Basic Algebra - Lesson 5 - Expressions from Sentences
3. Disaster Math - Six sets of interactive word problems: Earthquake Math, Hurricane Math, Tornado Math, Wild Fire Math, Winter Storm Math, and Flood Math.
4. Let's Do Lunch - [this link opens on a new page] Students use a menu to order lunches that meet various criteria. (Author - Sandi King)
5. Million Dollar Mission - a mathematics fantasy

1. Ambleweb Function Machine - students identify what process was used to produce a sequence of numbers (twelve processes available)

1. 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.
2. Coordinate Geometry - introduction, explanation, examples and practice problems
3. Coordinate Plane Practice - students type ordered pairs in the blocks on this interactive PowerPoint show
4. Create a Haunted House...if you dare! - Follow directions to sharpen your graphing skills, create a cool haunted house and then morph it using math. Expressions, Equation Solving and Graphing in the Coordinate Plane - The Haunted house and many more coordinate plane practice problems
5. General Coordinates Game - Students investigate the Cartesian coordinate system through identifying the coordinates of points, or requesting that a particular point be plotted.
6. Graphing Applet - interactive site which identifies the ordered pairs of points students click on - Advanced version of the same applet
7. Graphing Equations and Inequalities Unit Quiz
8. Graphing Ordered Pairs - explanation and interactive practice
9. Greg's Grid Graphs - [this link opens on a new page] help Greg and his family plan their visit to the museum
10. Maze Game - Students use their knowledge of points on a graph to move a robot to the target, while avoiding mines.
11. Ordered Simple Plot - interactive coordinate plane from Shodor
12. Practice from Math.com: The coordinate plane, Slope and y-intercept, and Graphing linear equations.
13. Rectangular Coordinate System - algebra tutorial
14. 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.
15. 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.
16. 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.
17. Spy Guys Interactive - Using Ordered Pairs - Click Skip Intro, then select Lessons, and then click on Lesson 18
18. Stock the Shelves - [this link opens on a new page] You are the clerk. Stock the shelves using a special coordinate plane.
19. What's the Point? - [this link opens on a new page] a coordinate plane game from Funbrain.com (use the hardest level)
20. 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.

1. Algebra [Grades 6 - 8]

1. Measuring Angles - use a virtual protractor
2. Protractor - learn how to position and read a protractor in order to measure an angle, and how to use either scale on the protractor
3. Sum of Angles in a Triangle - students can explore this concept by moving the vertices of the triangle with pressed mouse button
4. Triangle Calculator - Enter values three of the six sides and angles of the triangle and the other three values will be computed. The number of significant values entered will determine the number of significant figures in the results.

1. Alien Angles - estimate angles, without a protractor, ranging from 1-180 by dragging a movable line
2. Angles in a Triangle - interactive applet with several examples
3. Area Explorer - Students are shown shapes on a grid after setting the perimeter and asked to calculate areas of the shapes.
4. Banana Hunt -This game helps students practice the degrees of an angle
5. Calculate the Perimeter of the Rectangle - [this link opens on a new page] from FunBrain
6. Complementary Angles - [this link opens on a new page] Match the angles that are complementary. (a Quia game available in Matching, Flashcards, and Concentration format)
7. Finding the Third Angle of a Triangle - instruction, practice problems and a game
8. Geometric Terms - [this link opens on a new page] this Quia quiz contains four activities - matching, flash cards, concentration, and a word search puzzle - which reinforce students vocabulary concerning angles.
9. Introduction to Angles - [this link opens on a new page] Basic terms related to the classification of angles (a Quia game available in Matching, Flashcards, Word Search, and Concentration format)
10. Lesson on Perimeter of Polygons
11. Measuring Angles - online quiz with virtual protractor
12. Measuring Around - find circumferences, online quiz
13. Oblique Triangles - from Dave's Short Trig Course
14. Perimeter Explorer - Students are shown shapes on a grid after setting the area and asked to calculate perimeters of the shapes.
15. Perimeter of a Rectangle - Calculate the perimeter of a rectangle with given dimensions - instruction and review, practice, and a quiz &
16. Perimeter of a Square - Calculate the perimeter of a square with given dimensions - instruction and review, practice, and a quiz &
17. Protractor - learn how to position and read a protractor in order to measure an angle, and how to use either scale on the protractor
18. Right Triangle Calculator - choose the known side then click on the calculate button
19. Right Triangles - from Dave's Short Trig Course
20. Sum of Angles in a Triangle - students can explore this concept by moving the vertices of the triangle with pressed mouse button
21. Triangle Calculator - four different calculators
22. Triangle Calculator - enter values three of the six sides and angles of the triangle and the other three values will be computed
23. Types of angles and pairs of angles - good illustrations
24. Using Spreadsheets to Find Area and Perimeter - The cells of a spreadsheet are a useful way to represent area and perimeter.
25. Working with Angles - Answer the questions which deal with angles

1. All About Ratios - a Quiz
2. All About Ratios - links to several lessons by Cynthia Lanius
3. 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.
4. Comparing Ratios and Rates - online quiz
5. Determine the number based on the ratio - instruction and review, practice, and a quiz &
6. Determining the Ratio - instruction and review, practice, and a quiz &
7. Figure This: Math Challenge for Families - proportional reasoning
8. The Importance of Ratios and Proportions - this comes under the heading of a perfect answer to "Why do I have to learn this?" - how a stock market trader benefits from ratio and proportion
9. Interpreting and Applying Proportions - online quiz
10. Learning ratios and proportions through scale drawings - a text lesson plan
11. Math for Morons Like Us - a ThinkQuest entry on ratio
12. Nutshell Math: Ratios and Proportion - video lesson with examples and sample problems
    1. You Tube video of the same lesson - Instructor: Ms. Jenkins
13. Percentages and Proportions - online quiz
14. 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) - instruction and review, practice, and a quiz &
15. Percent with a Calculator - after the lesson there are problems to work
16. Practice with Ratios - online quiz
17. Proportion Practice Test - thirteen multiple choice questions
18. Proportions and Ratios - good explanation of means and extremes from Free Math
19. Rags to Riches: Ratio and Proportion Quiz - [this link opens on a new page] quiz at Quia
20. Rates, Ratios, and Proportions - [this link opens on a new page] a two person quiz from Quia
21. Ratio/Proportion Problems from Ask Dr. Math - three pages of links to real-world problems
22. Ratio & Proportion - math review practice exercises
23. Ratio & Proportion - A proportion is a name we give to a statement that two ratios are equal. (This is a 3 step lesson followed by a workout.)
24. Ratio and Proportion - explanation and examples
25. Ratio and Proportion - introduction, in depth explanation, examples and a workout of ten problems
26. Ratio and Proportion Quiz - play this game to practice writing ratios
27. Ratio Exercises: Dolls : Camera] | Same ratio -- Fish : Atom | Different ratio -- Spider : Lizard | Different ratio -- Dots : Stars | 2 Dolls for every 1 Camera | 3 Atoms for every 2 Fish | [How Many Spiders do You Have? | Which Way Gives More Pizza?
28. 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.
29. Ratios - a six page module from Purple Math
30. Ratios and Proportions - explanation with four sample problems
31. Ratios and Proportions - an interactive lesson in a slide show format
32. Ratios and Proportions - an 18 slide PowerPoint show
33. Ratios and Proportion Review - a 12 slide PowerPoint show
34. Review of Proportion - examples and practice problems
35. Review of Ratios - examples and practice problems
36. Skillwise: Ratio and Proportion - five part module; fact sheet, game, quiz, activity and worksheet
37. Spy Guys Interactive - Ratio - Click Skip Intro, then select Lessons, and then click on Lesson 3
38. Teaching Ratios and Proportions - suggestion for teachers and parents
39. Using Proportions - online quiz

1. A Mathematical Droodle - Two Triples of Similar Triangles
2. Compass and Straightedge Construction of Similar Triangles - lesson plan from PlanetMath
3. Math Open Reference: Similar Triangles - interactive triangle lesson
4. Proof Using Simiar Triangles - four examples to print and use in your classroom
5. Proportionality in Similar Triangles: A Cross-Cultural Comparison - a lesson plan from Convergence: a magazine of the Mathematical Association of America
6. Sam's Similar Shapes - [this link opens on a new page] learn about shapes that are different sizes but the same shape. (Author - Paulette Boggs)
7. Similar Polygons - from Math for Morons Like Us
8. Similar Triangles - a 23 slide PowerPoint show which includes scaling factors
9. Similar Triangles II - a 14 slide PowerPoint show
10. Similar Triangles - explanation of the concept
11. Similar Triangles - a You Tube video from Mr. Vann