solve the mathematics model from the problem concern with LETVS and the estimation

Lesson Plan Educational unit : Junior High School Subject : Mathematics Grade : VIII Competency standard : Understanding the linear equation with two variable system and use it to solve a problem in daily activities. Basic competence : solve the mathematics model from the problem concern with LETVS and the estimation Time Allocation : 3x 45 minutes Meeting : 1 times meetings A. Learning Objectives • Solve the mathematics model from the problem that concern with LETVS and the estimation. • Solve the LETVS by using the straight line graph D. Learning Materials The Application of LETVS E. Learning Method / Learning Model • Discussion • Demonstration • Giving Task • Question & Answer Approach • Contextual Teaching and Learning • Problem Based Instruction F. Learning Activity Opening • Apperception: Teacher and students discuss homework Teacher reminds students the ways to determine the solution set of LETVS and to draw a straight line. Main Activity a. Exploration : Teacher guides students to determine the solution set of mathematics models Teacher guides students to interpret the solution set in a graph. b. Elaboration : Teacher give exercises and asks student to do it Teacher give guidance if there is any problem face by student. c. Confirmation : Students perform their answer in front of class, the other student give comment. Closing • Teacher guides the students to make conclusion • Teacher gives homework G. Learning Sources • Student Book Class VIII • Worksheet H. Assessment Indicator of Learning Attainment Technique Assessment Type of Instrument Instrument Able to apply LETVS in the daily life Written test Show the ability - Worksheet - Questions in examples and exercises - Quiz Nina buys 5 oranges and 2 mangoes at price Rp 9,000.00. When she buys 2 oranges and 5 mangoes, she pays at price Rp 12,000.00. Determine the price for each fruits! The price of 6 books and 2 pencils are Rp 4,400.00. However, the price for 3 books and 4 pencils are Rp 3,400.00 Find the price for each pencil and book! And draw the graph!