## Reflection: Modeling Adding and Subtracting Integers on a Number Line - Section 5: Getting Pushed Back

For this section, I showed a clip of the patriots getting a gain of yards on one play and then Brady getting sacked on the next play.  I asked students how a team can lose yards, or get pushed back from their end zone, in football.  Students mentioned penalties, sacks, and getting pushed back by the defense.

I explained that when there is a subtraction sign, the team of the second number is losing yards, or getting pushed back.  I explained that in problem one, the negative team drives -3 yards for the first play.  Then during the second play, the yellow team intercepts the ball.  But since it is subtracting 2, that means that the yellow team gets pushed back 2 yards, away from their end zone.

For problem 2, I asked students who had possession of the ball on the first and second play.  A common mistake was for students to think that the second play involved the red team.  I called for volunteers to help me act out the problem.  They started at the 0 yard line and gained 3 yards towards their end zone.  Then in the second play, their quarterback was sacked and they lost five yards.  The play ended at the -2 yard line.

Loss of Yards
Modeling: Loss of Yards

# Adding and Subtracting Integers on a Number Line

Unit 3: Integers and Rational Numbers
Lesson 5 of 17

## 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.

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Standards:
Subject(s):
Math, Integers, Number Sense and Operations, number line, 6th grade, master teacher project, adding integers, subtracting integers
60 minutes

### Andrea Palmer

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