Integer Subtraction Lab

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Objective

Students will model subtraction with signed integers.

Big Idea

Can we model our mathematics into a rule for our mathematics?

Launch

5 minutes
  • POD

As student enter the room, they will have a seat, take out their Problem of the Day (POD) sheet and begin to work on the question on the SMARTboard. The POD also allows students to use MP 3 continually based on the discussions we have about the problem each day.

The POD today is a brief activity to allow us to review vocabulary. Students will do a vocabulary match on the SMARTboard to review the definitions of key terms. We will discuss them as they make matches, giving examples, etc.

  • Learning Target

The target for the day is also on the SMARTboard each day when students enter the room.  The target for today’s lesson is for students to apply what they understand about performing subtraction with integers.

Summary

5 minutes

Exit Ticket

What is a rule you’ve developed for subtraction with a negative integer? Show an example where your rule works.

 What I have found is that my students usually know how to "do" an algorithm but they don't always know how to explain it. If I don't understand what is written on the exit ticket, I can touch base with individual students for clarification. They can work with a partner to develop the rule. It is sometimes helpful to bounce the idea off of someone else to make sure the reader will understand.