This lesson plan is for a junior high school mathematics class on probability. The students will learn about sample spaces and sample points through experiments tossing coins and drawing colored marbles. They will work in teams to demonstrate experiments, identify sample points and spaces, and do exercises identifying sample points and spaces of simple probability events. The goal is for students to understand and be able to determine the sample space and sample points of experiments involving simple probability events.

1. LESSON PLAN
Level : Junior High School
Subject : Mathematics
Class : IX
Semester : I
Material : Probability
Time Allocation : 2 x 40 minutes
A. Standard Competence
4.Understanding the probability of simple event
B. Basic Competence
4.1 Determine thesample spaceof aexperiment
C. Indicator
Explainthe sample space, points of anexperimentsample
D. Learning Objective
a. Student can determine the sample point of simple event
b. Student can determine the sample space of simple event
c. Student can determine all sample point of an event
d. Student can determine all sample space of an event by using the sample point
E. Material
Probability
F. Learning Model
Cooperative
G. Teaching and Learning Activities
a. Introduction
Apperception
Teacher explain a story about the way to choose a place before the game start
or other by using the lottery
Motivation
Teacher explain the learning objective
b. Main Activity

2. Make teams that consist of 5-7 students
Each team is asked to demonstrate the experiment of tossing of coin five
times.
Each team is asked to explain their work
By using ask-question teacher ask student to know the sample point and
sample space of the experiment of tossing the coin.
Student is asked to do the experiment again by using 5 different color marbles
Student do the exercise.
c. Closure
Student is asked to summarize about the sample point and sample space
H. Learning Source
Textbook, environment, die, coin, bridge card, numbered card