Lesson Plan ID: 
33157 
Title: 
Factorials: Let's have a Dinner Party! 
Overview/Annotation: 
In collaborate groups of four, students will act out a dinner party where four dinner guests will attend. The students must act out the different ways to arrange four dinner guests. This is a College and CareerReady Standards showcase lesson plan. 
Content Standard(s): 
MA2015(6)  13. Write, read, and evaluate expressions in which letters stand for numbers. [6EE2]  MA2015(6)  17. Use variables to represent numbers, and write expressions when solving a realworld or mathematical problem; understand that a variable can represent an unknown number or, depending on the purpose at hand, any number in a specified set. [6EE6] 

Local/National Standards: 
Mathematical Practice Standards: 3. Construct viable arguments and critique the reasoning of others. 7. Look for and make use of structure. 8. Look for and express regularity in repeated reasoning. 
Primary Learning Objective(s): 
Students will use a reallife problem to calculate permutations and/or factorials. 
Additional Learning Objective(s): 

Approximate Duration of the Lesson: 
31 to 60 Minutes 
Materials and Equipment: 
Set of Cards that have the following letters on them: A, B, C, D. Cards One set for each collaborative group. paper pencil large chart paper Colored cards for sorting students into groups 
Technology Resources Needed: 

Background/Preparation: 
Students should be fluent in multiplication facts and recognizing number patterns. Teacher should prepare Dinner Guest Cards before the students arrive for class. 
Procedures/Activities: 
As students enter the classroom, the teacher will hand out a colored card to each student. Students will be arranged in groups of four. Prepare enough different colored cards to provide for the four groups.
Before (activate prior knowledge)  Essential Question:
The teacher will ask: "Give examples of ways that you use multiplication in your life?" Groups will share one way they use multiplication in real life. (3  5 minutes)
During: (Actively engage students) (35 minutes)
The teacher will say: "Today you will pretend to be at a dinner party. You have four guests at your dinner party. How may ways can you arrange the seating of the guests?"
 Handout the Dinner Party Guest Cards to each group.
 On a sheet of paper, the students should write down the letters A, B, C, D.
 Students line up the cards in the order of A,B,C,D.
 As the students move the cards around in different arrangements, they will record the arrangement on their paper and the chart paper.
 Students should record the total number of arrangements they found (24).
 Groups will call out one arrangement and as the other groups find the same arrangements on their paper, they will put a check mark by the arrangement.s\ (answer to dinner party)
 Students will discuss any patterns that they noticed as they were arranging the letters. Groups will share with the other groups any patterns they noticed.
 At this point, tell the students that the mathematical term for these type of arrangements are called factorials or permutations.
 On the board, the teacher will write 4!. Ask the students if they recognize anything written on the board. (Misconception: Based on their background experience, they will think that the ! is an exclamation symbol.) Tell the students that in math, this symbol is used for permutations or factorial. The teacher should read 4! as four factorial.
 On the board write, 4! = 4 X 3 X 2 X 1 = 24. Ask them to describe the number pattern.
 Four students should be selected to come to the front of the room (with a dinner guest card). They are to sit in one of the chairs in the order of A,B,C,D. The teacher will call out the different arrangements and the dinner guests will move to their new seat. Students will see the different arrangements.
 Other groups of four dinner guests may come to the front of the room and act out the arrangements.
 Handout the worksheet that goes with the book Anno's Mysterious Multiplying Jar
 Read aloud the book, Anno's Mysterious Multiplying Jar or use the video. (if your school system does not allow you to access youtube you may download the video using Keepvid.)
 As the book is being read, students will fill in the number pattern for each factorial. Groups will share their answers.
After: (Assess) Use an Quick Write to quickly assess understanding of factorials.

Attachments:**Some files will display in a new window. Others will prompt you to download. 
EnrichmentActivityforFactorials.doc
DinnerPartyAnswer.doc
DinnerGuestCards.doc
QuickWriteforFactorials.doc

Assessment Strategies: 
The Quick Write will be used to assess enduring understanding of factorials.

Extension: 
Enrichment Activity for Factorials: Students will calculate the number of arrangements for the word, STEGALL. Key Question: Will the double L's make a difference in the answer? 
Remediation: 


Each area below is a direct link to general teaching strategies/classroom
accommodations
for students with identified learning and/or behavior problems such as: reading
or math performance below grade level; test or classroom assignments/quizzes at
a failing level; failure to complete assignments independently; difficulty with
shortterm memory, abstract concepts, staying on task, or following directions;
poor peer interaction or temper tantrums, and other learning or behavior problems.

Presentation of Material

Environment 
Time Demands 
Materials 
Attention 
Using Groups and Peers 
Assisting the Reluctant Starter

Dealing with Inappropriate
Behavior 
Be sure to check the student's IEP for specific accommodations.

Variations Submitted by ALEX Users: 
