1. LESSON PLAN
SCHOOL : Purworejo 2 Junior High School
SUBJECT : Mathematics
CLASS / SEMESTER : VIII/1
TIME ALLOCATION : 10 x 40 minutes
A. Standard Competence
2. To understand Linear Equations System with Two Variables (LESTV)
B. Basic Competence
2.1. Solve LESTV
C. Learning Objectives
 Students are able to mention the differences between linear equation with two variables
(LETV) and linear equations system with two variables (LESTV)
 Students are understand the meaning of root
 Students are able to know linear equations system in various form and variables
 Students are able to determine the root of linear equations system by substitution,
elimination, and graphic methods
D. Learning Materials
Linear Equations System with Two Variables (LESTV)
The definition of LESTV, LETV, and the root of LETV
Determining the root of LESTV
E. Learning Method
 Discussion
 Demonstration
 Giving Task
 Question & Answer
Approach
 Contextual Teaching and Learning
 Direct Instruction
 Cooperative Learning
 Problem Based Instruction
F. Learning Activity
First
Meeting
Opening
 Apperception:
Teacher reminds students about Linear Equation with 1 Variable (LEOV)
 Motivation:
Teacher tells a problem that related to LESTV
Main Activity
a. Exploration :
 Teacher gives examples LETV
 Teacher gives other examples
 Teacher guides students to conclude the definition of LETV

2. b. Elaboration :
 Teacher explains the solution sets of LETV
 Teacher explains LESTV
 Teacher guides students how to state a variable with other variables
(responsibility)
 Gives some exercises and helps students to do it(outonomy and honesty)
 Teacher explains about “root” and “not root” of LESTV
c. Confirmation :
 Gives some exercises and asks students to do in front of class
Closing
 Teacher guides the students to make conclusion
 Teacher gives homework
Second
Meeting
Opening
 Apperception:
- Teacher and students discuss homework
- Teacher reminds students how to state a variable with other variables
Main Activity
a. Exploration :
 Teacher explains the ways to find the solution of LESTV there are substitution,
elimination, and graphic methods
 Teacher tells that they going to learn substitution method
 Teacher asks students about the meaning of “substitute”
 Teacher explain the main rule in substitution method
 Teacher gives example
b. Elaboration :
 Teacher guides students to solve that example step by step(thinking logically)
 Teacher give exercises and asks student to do it(outonomy and honesty)
c. Confirmation :
 Students show their answer in front of class
Closing
 Teacher guides the students to make conclusion
 Teacher gives homework
Third
Meeting
Opening
 Apperception:
- Teacher and students discuss homework
- Students show their answer in front of class
Main Activity
a. Exploration :
 Teacher continues to second method: elimination method
 Teacher asks students about the meaning of “eliminate”
 Teacher explain the main rule in elimination method
 Teacher gives example
b. Elaboration :
 Teacher guides students to solve that example step by step(thinking logically)
 Teacher give exercises and asks student to do it(outonomy and honesty)
c. Confirmation :
 Students show their answer in front of class(responsibility)

3. Closing
 Teacher guides the students to make conclusion
 Teacher gives homework
Fourth
Meeting
Opening
 Apperception:
- Teacher and students discuss homework
- Students show their answer in front of class
- Teacher remind how to draw a line on Cartesian coordinate
Main Activity
a. Exploration :
 Teacher gives example
 Teacher guides students to draw a linear equation system on Cartesian
coordinate
 Teacher guides students to conclude that the root is in the intersection point of
two lines
 Teacher gives another example
 Teacher tells the weakness of graphic method
 Teacher explains that we can combine between substitution and elimination
methods
 Teacher gives example
b. Elaboration :
 Teacher guides students to solve that example step by step(thinking logically)
 Teacher give exercises and asks student to do it(outonomy and honesty)
c. Confirmation :
 Students show their answer in front of class
Closing
 Teacher guides the students to make conclusion
 Teacher gives homework
Fifth
Meeting
Opening
 Apperception:
- Teacher and students discuss homework
- Students show their answer in front of class
- Teacher remind how to draw a line on Cartesian coordinate
Main Activity
a. Confirmation :
 Teacher makes quiz for 20 minutes
 Teacher makes sure that students do it by themselves
Closing
 Teacher submit their answer
G. Learning Sources
 Student Book Class VIII
 Worksheet

4. H. Assessment
Indicator of Attainment Technique
Type of
Instrument
Examples
 able to mention the
differences between
LETV and LESTV.
 able to know LES in
various form and
variables.
 to determine the root
of LESTV by graphic,
substitution, and
elimination method.
Written test
Show the
ability
- Worksheet
- Questions in
examples and
exercises
- Quiz
Find all possible answer for
2x – 3y = 0 if x and y is the
elements of real numbers.
Solve these LESTV with
elimination or substitution
method :
- 3x – 5y = 5 and x – 5 = 0
- x + 3 = 0 and 2x – y = 1
𝐹𝑖𝑛𝑎𝑙 𝑆𝑐𝑜𝑟𝑒 =
𝐴𝑐𝑞𝑢𝑖𝑟𝑒𝑑 𝑆𝑐𝑜𝑟𝑒
𝑀𝑎𝑥𝑖𝑚𝑢𝑚 𝑆𝑐𝑜𝑟𝑒
× 𝐼𝑑𝑒𝑎𝑙 𝑆𝑐𝑜𝑟𝑒 = …
Acknowledge by Purworejo, Juli 16th, 2012
The Principal Mathematics Teacher
Drs. Tamsir Marsudi Utomo, MM Safrudin Fajar Nugroho, M.Pd
NIP. 19620628 198803 1 009 NIP 19710423 199401 1 002