The lesson study team had imagined that some correct mathematical statements about Student A’s work would be made and that some concern about zero would be raised. The team also had foreseen that students might forget the mathematical purpose of these tabular representations, specifically when the three plans would cost the same. Student A had created one vertical table depicting all three plans. The table did not match the plans, but was mathematically correct. Additionally, Student A did include zero in their table which provided the class the opportunity to think about the insight that is gained by including zero in a table. For this investigation, zero provided the students with the information on whether or not there was a monthly fee.

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Lesson Planning

Introduction

Problem 1

Problem 2

Closure

Student Debrief

Faculty Debrief

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Transcripts & Related Articles

• Video Transcript
  
• Student Work Samples (Set 1)
  
• Student Work Samples (Set 2)
  
• Student Work Samples (Set 3)
  
• Student Work Samples (Set 4)
  
• Student Work Samples (Set 5)
  

Materials from Cecilio Dimas' DVD Plans Comparing Linear Functions Lesson

• DVD Plan Teacher Lesson Plan
  
• DVD Plan Lesson Introduction
  
• DVD Plan Student Packet
  
• DVD Plan Next Steps
  
• DVD Plan Challenge Problems
  

Materials from Cecilio Dimas' following lesson: Carnival Ticket Plans Comparing Linear Functions

• Prelesson Student Packet
  
• Student Work Cover Sheet
  
• Carnival Ticket Plans Prompt
  
• Carnival Ticket Plans Poster
  
• Tabular Representations of the Carnival Ticket Plan
  

Related MARS Tasks:

• Picking Apples Task Packet
  
• Gym Task Packet