Reflection: Checks for Understanding Adding and Subtracting Integers on a Number Line - Section 4: Interceptions


I asked for a student to explain what happens when there is an interception in football.  Then I showed a quick video clip of an interception.  I explained that we can tell there is an interception by seeing that one value is positive and one value is negative.  I continued to mention that since the sign was addition, each team was gaining yards and moving towards their own end zone.

I continued to pick volunteers to act out the problems and do the “play by play”.  Students worked on the practice problems independently.  Problem 5 was problematic for some students.  Some students first drew a red line from 0 to -6 and then drew a yellow line from 0 to 6, instead of a yellow line from -6 to 0.  I called on students to act this out.  I asked students, “At which yard line does the yellow team get possession of the ball?”  Students were able to tell me that the yellow team got the ball at the -6 yard line.  Then the yellow team gains 6 yards towards their own endzone.  

  Clarifying Mistakes
  Checks for Understanding: Clarifying Mistakes
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Adding and Subtracting Integers on a Number Line

Unit 3: Integers and Rational Numbers
Lesson 5 of 17

Objective: SWBAT: • Add and subtract integers using a number line

Big Idea: What happens when you add positive 5 and negative 3? What happens when you subtract positive 2 from negative 3? Students work with a number line and football to model adding and subtracting integers.

  Print Lesson
Math, Integers, Number Sense and Operations, number line, 6th grade, master teacher project, adding integers, subtracting integers
  60 minutes
unit 3 4 image
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