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PBS
Pbs Mathline: How Many Noses Are in Your Arm? Lesson Plan [Pdf]
Students will determine how many noses are in your arm by exploring measurement and ratio. Printable lesson.
Other
The Futures Channel: Proportional Reasoning
"Connecting learning to the real world" is the goal of the Futures Channel. Through the use of short videos, teachers can integrate real-world examples of how math and science are used in everyday life. Complete teaching guidelines...
Shmoop University
Shmoop: Ratios & Percentages: Solving Proportions
Students learn how to solve proportions. The mathematics resource consists of examples and practice problems with answers.
CK-12 Foundation
Ck 12: Measurement: Distances or Dimensions Given Scale Measurements
[Free Registration/Login may be required to access all resource tools.] Find actual distances or dimensions using a given scale, ratio, or proportion.
Texas Instruments
Texas Instruments: Picturing Probabilities of Number Cube Sums
Students use ideas of ratio and proportion to investigate various ways to make a circle graph. Students create graphs to display the probabilities of the different sums that can be generated with two number cubes. [Requires Adobe Reader.]
CK-12 Foundation
Ck 12: Measurement: Scale Distances or Dimensions
[Free Registration/Login may be required to access all resource tools.] Find scale dimensions using actual measurements and a ratio or proportion.
Science and Mathematics Initiative for Learning Enhancement (SMILE)
Smile: Similarity
This site contains a lesson plan for high school age students. The objective is to discover the factor of proportionality in similar polygons and to relate this factor to the perimeters and areas of similar polygons.
The Math League
The Math League: Ratio and Proportion
Detailed explanations of ratio, comparing ratios, proportion, rate, converting rates, and average rate of speed, all with examples.
ClassFlow
Class Flow: Ratio and Proportion Geometry Review
[Free Registration/Login Required] This flipchart is a Jeopardy style review for Ratio and Proportion. Comes form the McDougal Littell Geometry book.
Science and Mathematics Initiative for Learning Enhancement (SMILE)
Smile: Learning Ratios & Proportions Through Scale Drawings
Website which strengthens the conceptual connection between scale drawings and ratios through an activity lesson.
Illustrative Mathematics
Illustrative Mathematics: 7.rp Two School Dance
The purpose of this task is to see how well students students understand and reason with ratios. This task was adapted from problem #14 on the 2011 American Mathematics Competition (AMC) 8 Test. Aligns with 7.RP.A.3. The site provides a...
University of Cambridge
University of Cambridge: Maths and Sports: Triathlon and Fitness
The triathlon is a physically gruelling challenge. Can you work out which athlete burnt the most calories? This activity provides a real-life context for working with proportionality, speed, rates, and units of measurement and is aimed...
CK-12 Foundation
Ck 12: Arithmetic: Fractions as Percents Grade 7
[Free Registration/Login may be required to access all resource tools.] Write fractions as percents by using proportions and equal ratios.
Illustrative Mathematics
Illustrative Mathematics: 6.rp Jim and Jesse's Money
In this real-world context, 6th graders are given the ratio of Jim's money to Jesse's and the amounts they have spent so far on a road trip, and they must calculate what each person had at the start of the trip. Aligns with 6.RP.A.3.
Illustrative Mathematics
Illustrative Mathematics: 7.rp,ee Gotham City Taxis
The purpose of this task is to give students an opportunity to solve a multi-step ratio problem that can be approached in many ways. The site includes a task and the solution.
Better Lesson
Better Lesson: Understanding Tape Diagrams
Using a tape diagram is one of the key models for ratios and proportions.
Common Core Sheets
Common Core Sheets: Rate Language 6.rp.2 Worksheets
Print or create worksheets or flashcards to assess students' understanding of ratio concepts.
Other
P.u.e.m.a.c.: Que Es La Razon Aurea?
Find out how to calculate the Golden Ratio in this exercise.
Illustrative Mathematics
Illustrative Mathematics: 6.ee,rp 7.ee,rp Anna in d.c.
The purpose of this task is to give students an opportunity to solve a multi-step percentage problem that can be approached in many ways. Because the tax and tip in this problem are a fixed percentage of the cost of the meal, the total...
Illustrative Mathematics
Illustrative Mathematics: 8.ee Sore Throats, Variation 2
For this task where two saltwater solutions are compared, 8th graders must find equivalent ratios, write an equation that works for both solutions, draw the equation's graph, and interpret the slope as a unit rate. Aligns with 8.EE.B.5.
Texas Instruments
Texas Instruments: Math Today Wing Tabs Save Fuel
Using the USA TODAY Infograph, 'Wing tabs save fuel', ratios and proportions will be used to explore the concept of similarity between a drawing/model and the actual dimensions. The effects of dilation (size change) on an image and...
PBS
Pbs Teachers: Math Space Odyssey: How Much Do You Weigh in Outer Space?
Demonstrate the ability to apply the use of decimals, fractions, ratios and proportions to situations based upon given information about planets in the solar system.
Math Drills
Math Drills: Fractions Worksheets
Download and print these worksheets to sharpen your skills working with fractions. Worksheets focus on modeling fractions, ratios and proportions, comparing, ordering, simplifying, converting, and order of operations.
PBS
Pbs Learning Media: Cyberchase: Bianca Gets in Gear
Bianca visits a bike shop and learns how bicycle gears work in this Cyberchase video segment. [3:26]