LESSON PLAN
School unit :SMP N I BOYOLALI
Subject :Mathematics
Class/semester :VIII/I
 Standard of competence :
Understanding algebra forms, relations, function, and linear equations.
 Basic of competence :
Understand the relation and function
 Indicators :
The student can the expressing a relation of two set by arrow diagram, cartesian diagram, and ordered pairs.
 Time allocation : 2 x 30 minutes
 Learning achievement :
After studying the lesson, student will be able to :

 Explain definition of relation of two sets
 Express a relation of two sets by arrow diagram
 Express a relation of two sets by cartesian diagram
 Express a relation of two sets by ordered pairs
 material :
Relation and function
 Method / aproach :
Orally, drill, and task assignment
 Activity
· opening
Teacher reminded about venn diagram and cartesian coordinate
· main activities :
a. Ask students to find definition relation
b. Ask student to find other example of relation which not all elements of frist set having relation with elements of second set.
c. Explains relation of two sets that expressed by arrow diagram,cartesian diagram and ordered pairs.
· Closing :
o Teacher guides student to make conclusion
o Teacher gives homework
 Tool and references :
text book, white board, grid paper,ruler,and komputer
 Assesment :
Kind : formative test discussion result
Form : Essay
Example :
1. Given A {2,3,4,5} and B {4,9,25} relation R between the members of the set A and those of the set B is a “factor of “. Express the relation using an arrow diagram, cartesian diagram, and ordered pairs.