Multiplication and Division

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Multiply or Divide

Rationale: Multiplication and division are two very important concepts to understand. There are many times in an average day where one would need to multiply or divide. This lesson has real life connections that are important in taking math outside the classroom. For example, in this lesson the students will be learning when to use multiplication or division in a word problem. This is very important, seeing how math equations are not set up and written out in real life. By reading the passage, they recognize cues in the question that will let them understand when to multiply or divide. Another important real life connection this lesson makes is this lesson is their first introduction to division. This lesson is designed for students to make the connections between multiplication and division, as well as understand when to use them. For example, knowing that 4x5=20, a student can understand 20/5=4 by making the connection _x5=20.

Standards: Math Standard Number 3, Key Idea number 1 Mathematical Reasoning.

Materials: linker cubes, math problem handouts (one for each student), page 58 through 63 of teacher handbook, overhead transparencies and overhead markers.

Anticipatory Set: “Okay who can tell me what multiplication is?” “Who can tell me what division is?” Today we are going to use word problems to figure out when to use multiplication or division.

Objectives:

1. From this lesson, the student will be able to identify when to use multiplication or division.

2. From this lesson, the student will be able to apply knowledge of multiplication and division to word problems.

3. From this lesson, the student will be able to solve multiplication and division problems.

Purpose: For this lesson, we will be introducing division. We will also be using word problems to differentiate when to use multiplication or division.

Input: Activity sheet handout (22) and linker cubes (one set per student).

Model: I will have 5 overhead transparencies. On each sheet their will be one math problem. Each student will also have a handout of the 5 problems. Using the transparencies, we will model how to determine weather a word problem is multiplication or division. Then demonstrate how to do the problems.

Activity:

1. First, I will pass out the handouts to each student. I will also explain to the students I will hand out linker cubes when it is time to do question #3, but not before.

2. I will explain to the class that we will be doing multiplication and division word problems today. I will ask the question, when do we multiply? After a student gives to correct response, I will then lead into a division problem.

3. For each question on the handout, I will have an overhead sheet that I will use to keep everyone on track. At the beginning of each question, I will ask, “Is this a multiplication or a division problem?” After the class gives the correct response, I will then ask, “How might we solve this problem?” I will then write out and solve the problem based on student correct response. The class will then follow along and write it on their handouts.

4. When it is time to do question three on the handout, I will handout the linker cubes to the class. I will then instruct the students to work in pairs to solve the problem using the linker cubes. During this time, I will walk around, check the students’ progress, and clear up any confusion. When the class is done, I will ask a student to come up and draw what they did on the overhead. I will then collect the linker cubes.

5. For the final problem, the students will work independently. I will walk around to assess and clear up any confusion.

6. At the end of the lesson, I will collect the worksheets to use for assessment.

Check Understanding: Ask several questions throughout the lesson to clarify and to check to understanding.

Guided Practice: I will display each question on the overhead, and I will ask the class if it is a multiplication or a division problem? Them I will direct class responses to answer the problem.

Evaluate/Closure: At the end of the lesson, I will have the students do one problem on their own on their worksheet. I will then collect the worksheets to check for clarification.

Independent Practice: They will be given one word problem to complete on their own. They will have to write weather it is a multiplication or division problem and then solve the problem. They must show work!