Lesson plan about set

1. LESSON PLAN
School : Junior High School 9 Palembang
Subject : Mathematics
Class / Semester : VII (Seven) / Even
Time Allocation : 2 x 40 minutes
Standard of Competency : 4. Using the concept of set and Venn diagram in
problem solving
Basic Competency : 4.3 Doing the operation of intersection, union,
difference and complement of set.
Acquired Competence Indicators
1. Determine the intersection of sets
2. Determine the union of sets
A. Learning Objectives
By discussions, students are able to:
1. Determine the intersection of sets.
2. Determine the union of sets.
B. Character Building : creative, curiosity, careful
Entrepreneurship : hardwork, comunicative, innovative, creative
C. Learning Material
Intersection of sets
The intersection of the sets A and B is a set which consists of all common elements of A and
B. Formally, it is written A  B = {x xA and xB}
Union of sets
The union of the sets A and B is a set whose elements are elements both sets.
It is denoted by A  B = {x xA or xB}
D. Sources, Tools and Medias
 Wintarti, Atik, ect. (2008). Contextual Teaching and Learning: Junior High School
Grade VII Edition 4. Jakarta: Ministry of Education
 ICT, power point
 Worksheet

2. E. Learning Methods : Direct instruction, discussion, interactive and
discovery.
F. Teaching and Learning Objectives
INTRODUCTION Time
 Teacher reminds what they learn
of the last meeting.
 Teacher gives some examples in
our daily life about set.
 Teacher informs the learning
objectives.
 Student pay atention of teacher’s
explanation.
 Students respond teacher’s question.
7’
3’
MAIN ACTIVITY
Exploration
 Teacher divides students into 5
group, its consist into 3 or 4
students.
 Teacher gives the worksheet.
 Teacher gives some questions
about intersection and union in
the worksheet.
 Teacher guides discussion how to
determine the intersection and
union of sets.
Elaboration
 Teacher ask one of students to
inform the result and ask the other
to respons it.
 Teacher guide the class
disscusion.
 From the class discussion, teacher
guides students to summarize.
Confirmation
 Teacher gives the exercises.
 Students join each of group.
 Students read the worksheet.
 Students answer the question in the
worksheet.
 Students discuss how to determine
the interaction and union of sets.
 One of student informs the result
about intersection and union through
worksheet.
 Other students respond the result.
 Students summarize the result.
 Students answer the exercises.
3’
5’
12’
15’
15’
15’
CLOSING

3.  Teacher guides students to
summarize.
 Teacher gives homework.
 Students summarize the material.
 Students respond teacher’s question.
5’
G. Evaluation
Technical instrument : orally test, written test
Form of instrument : question list, essay
Examples of instrument :
Indicator Example of instrumen Answer key
Skor
1. Determine the
interaction of sets!
2. Determine the
union of sets!
Let:
A = {k, l, m, n, o}
B = {m, n, o, p}
a. Describe A  B by
listing its element
b. Describe A  B by
listing it element.
a. A  B = {m, o, p}
b. A  B = {k, l, m, n,
o, p}
1
1
Palembang,
Head Master Mathematic Teacher
_______________________ _______________________
NIP. NIP.
100
2
x
scoreofsum
result 