Decide whether two quantities are in a proportional relationship, e.g., by testing for equivalent ratios in a table or graphing on a coordinate plane and observing whether the graph is a straight line through the origin.

#### Isolation Drills:

- Analyzing an Identifying Proportional Relationships
- Constructing and Comparing Proportional Relationships

#### Interactive Practice:

- Algebra: Solving Proportions – A quiz from Quia using the Rags to Riches format
- All About Ratios – A famous Texas chef has a secret recipe for her chili. Use ratios to discover the missing ingredient of her recipe
- All About Ratios – Five-question multiple-choice quiz
- All About Ratios – Links to several lessons by Cynthia Lanius
- All About Ratios – Match the given ratio to another problem
- All About Ratios – Match the given ratio to a problem about fish
- All About Ratios – Match the given ratio to a problem about cameras
- All About Ratios – Match the given ratio to a problem about stars
- All About Ratios – Match the given ratio to a problem about spiders
- All About Ratios – Match the given ratio to a problem about atoms
- All About Ratios – Match the given ratio to a problem about dolls and cameras
- Cat and Mouse Proportion – The problem is actually a brain teaser and a great opportunity to teach direct variation and inverse variation
- Comparing Ratios and Rates – Take a five questions multiple-choice quiz about ratios and rates
- Determine a Number Based on the Ratio – Click on the Start button and then determine the ratio of the given numbers
- Determine the Ratio – Click on the Start button and then determine the number that fits the given ratio
- Dirt Bike Proportions – Select the correct proportion; the quicker you answer the faster your bike will go
- Equivalent Fractions – Determine which gems are equivalent to the ones wanted by each store and then ship the order (check to see if you were right)
- Hand Squeeze – Pass a “hand squeeze” around a circle and measure the amount of time that it takes for the hand squeeze to complete the circle. This is a data collection and analysis class experiment
- Interpreting and Applying Proportions – Multiple choice quiz with real-world problems
- Learning ratios and proportions through scale drawings – A text lesson plan
- Math Challenge – Use proportional reasoning to answer this problem
- Percent with a Calculator – Explanation, examples and a link to a quiz to check understanding
- Percentage – Index of lessons available at AAA Math
- Percentages and Proportions – Short multiple choice quiz
- Percentages and Ratios – Index of lessons available at AAA Math
- Practice forming Ratios – After you have tried several of the practice problems, scroll down for a quiz
- Practice with Ratios – Eleven multiple choice questions about ratios
- Practice with Ratios – Ten question quiz, answers and explanations are available from drop down boxes -from the Internet archive
- Proportion Word Problems – Explanation and examples from an algebra page; direct and inverse proportion are explained
- Proportions – Three-step lesson followed by a quiz
- Proportions and Ratios – Includes a good explanation of means and extremes
- Rates, Ratios and Proportions – Quiz in the format of a two person game
- Ratio – Spy Guys interactive lesson
- Ratio – Which choice gives more pizza per student
- Ratio and Proportion – One minute video about ratio and proportion
- Ratio and Proportion – Level 1 quiz
- Ratio and Proportion – Entry level quiz
- Ratio and Proportion – This explanation includes a discussion about rates
- Ratio and Proportion – Key words to keep in mind as you work with ratio and proportion
- Ratio and Proportion – Select how many questions you want to answer from a drop-down menu
- Ratio and Proportion Problems – An index of problems and their explanation from Ask Dr. Math
- Ratio and Proportions – Short video lesson explaining ratios and proportions
- Ratio Blaster – A game for finding equal ratios
- Ratio Introduction – Short explanation from Math for Morons Like Us
- Ratio Proportion Calculator – This calculator teaches the basics of algebra in setting and determining unknowns
- Ratio Stadium – A racing game practicing the skill of making ratios
- Ratios – Seven pages filled with examples at Purple Math
- Ratios – This three page explanation followed by a quiz includes explanation about equal ratios
- Ratios and Proportions – Quiz in the rags to riches game format
- Ratios and Proportions – A thirteen slide interactive show to practice making ratios and expressing proportions
- Real World Problems – Three practice problems with a link to find the solutions
- Review of Proportions – How to set up various types of proportions
- Review of Ratios – How to set up ratios and how to compare them
- Shade – Shade in the correct amount of units to equal the fraction by clicking on the unit
- Sharing Prize Money – This worksheet uses UK money, but ratios are set up the same way
- Sharing Prize Money 2 – This worksheet uses UK money with a profit and loss scenario
- Simplifying Ratios – How to make ratios smaller so that they are easier to understand
- Solve it! – Videos provide problem solving practice for students. Each set contains five multistep word problems with step by step video solutions. Concepts include basic operations, algebraic reasoning, money, fractions, percent, perimeter, area, proportional reasoning, and measurement.
- Teaching Ratios and Proportions – Suggestions for parents to use to help students learn this topic
- Understanding Ratio – A worksheet to print so students can practice working with ratios
- Using Proportions – Five multiple choice questions
- Writing Ratios as Fractions – Worksheet for expressing ratios as fractions

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