Heather Stephan WESTERN MIDDLE, ELON, NC
7th Grade Math : Unit #4 - Operations with Rational Numbers : Lesson #19

# Multiplying and Dividing Integers

Objective: Students will be able to mulitply and divide integers.
Standards: 7.NS.A.2 7.NS.A.2b 7.NS.A.2c MP1 MP3 MP6
Subject(s): Math
60 minutes
1 Launch - 10 minutes

Opener:  As students enter the room, they will immediately pick up and begin working on the opener.  Please see my instructional strategy clip for how openers work in my classroom (Instructional Strategy - Process for openers).  This method of working and going over the opener lends itself to allow students to construct viable arguments and critique the reasoning of others, which is mathematical practice 3.

Learning Target:  After completion of the opener, I will address the day’s learning targets to the students.  In today’s lesson, the intended target is, “I can multiply and divide integers.” Students will jot the learning target down in their agendas (our version of a student planner, there is a place to write the learning target for every da

resources
Multiplying and Dividing Integers Opener.docx
https://betterlesson.com/lesson/resource/1961673/opener
2 Explore - 55 minutes

Instructional Strategy - How do table challenges work?: For today’s table challenge I am going to have students complete multiplication and division of integers through evaluating expressions. The challenge utilizes the multiple choice feature of the smartboard. I will give the students the values of a, b and c prior to the challenge, and then each question will ask that they perform operations on those values. For this challenge, I will pull cards labeled 1-8 to determine which table (1-8) answers which question. As with all work with signed numbers, students will need to be precise with their calculations (mathematical practice 6). This activity also poses the questions in a new format (expressions) so students will need to persevere with problem solving to get them answered correctly (mathematical practice 1).

Delivery Reflection
Lesson Planning

I am really glad that I used expressions for the table challenge.  Substituting values in an expressions is an important algebraic skill, and I find that kids often do not understand the way that expressions are written - and thus do not simplify them correctly.  In this particular activity, I was able to clear up misconceptions on a term like "-a", when a = -2.  They were able to get the kinks out in terms of having a - - 2, and that led to greater success (well fewer questions at least) on the homework!

3 Summarize + Homework - 5 minutes

Tic Tac Toe:  To summarize this lesson, I am going to ask students to discuss at their tables how they could arrange 3 positives and 6 negatives on a tic tac toe board such that every possible three in a row represents the multiplication and division sign rules.  I will instruct tables to stand when they have the solution, and I will have the first table up to present it to the class.

Homework:  I will pass out the homework assignment so that students have a moment to look it over before leaving class. Philosophy on Homework

resources
Multiplying and Dividing Integers HW.docx
https://betterlesson.com/lesson/resource/1961670/homework