Ratios and Proportional Relationships Error Analysis

Grade Levels
6th - 9th
Formats Included
  • PDF
12 student error analysis pages plus answer keys
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Error analysis is a great way to get your students engaging in higher level thinking! My students love being the teacher and finding other students' errors. In this product, you will get 12 different error analysis problems all related to ratios and proportional relationships. In each problem, the work of two different students will be shown. One student has the correct answer while the other student does not. This activity requires more rigor than traditional error analysis because students not only have to find an error, but they also have to figure out which student is correct!

Specific topics in this product include:
• Identifying Proportional Relationships
• Constant of Proportionality
• Writing an Equation for a Proportional Table
• Unit Rates with Complex Fractions
• Explaining the Meaning of an Ordered Pair
• Multi-Step Percent Word Problems
• Percent Error
• Simple Interest
• Percent of Change
• Solving Proportions
• Sales Tax
• Markups and Markdowns

These error analysis activities can be used in a variety of ways! In my classroom, I have used them as:
• Bellwork/Opening Problems throughout my unit
• Tickets out the Door
• Stations - students find the error at each station
• Small Group Instruction

Check out some of my other products related to ratios and proportions:
Unit Rates with Complex Fractions Lesson Plan
Percent Proportion vs. Percent Equation
Constant of Proportionality Pyramid Puzzle
Constant of Proportionality Jigsaw
Proportional vs. Non-Proportional Relationships Mazes
Proportional Relationships Bundle
Constant of Proportionality - Odd Man Out
Proportional Relationships Tournament Challenge

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This purchase is for one teacher only. Additional licenses are available at a discounted price.
Total Pages
12 student error analysis pages plus answer keys
Answer Key
Teaching Duration
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to see state-specific standards (only available in the US).
Use proportional relationships to solve multistep ratio and percent problems. Examples: simple interest, tax, markups and markdowns, gratuities and commissions, fees, percent increase and decrease, percent error.
Explain what a point (𝘹, 𝘺) on the graph of a proportional relationship means in terms of the situation, with special attention to the points (0, 0) and (1, 𝘳) where 𝘳 is the unit rate.
Represent proportional relationships by equations. For example, if total cost 𝘵 is proportional to the number 𝘯 of items purchased at a constant price 𝘱, the relationship between the total cost and the number of items can be expressed as 𝘵 = 𝘱𝘯.
Identify the constant of proportionality (unit rate) in tables, graphs, equations, diagrams, and verbal descriptions of proportional relationships.
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.


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