Brain Dump

Source: Mathematics For Junior High School I year VII by Marsigit     Chapter I: Integers. Page 25, Number 2 A rocket needs 4 days to go to the moon in which the distance from the earth is 5×〖10〗^5 km. Calculate the distance of the rocket’s journey in 1 day! Answer: It is known that a rocket needs 4 days to reach the moon. The distance of the moon from the earth is five hundred thousand. To calculate the rocket’s journey on a day, the distance of the moon from the earth is divided by the days needed. It becomes five hundred thousand kilometers divided by four days. It is equal to one hundred and twenty five thousand.     Chapter II: Fraction. Page 67, Number 4 70% of students of a junior high school present on the Independent Day celebration. If the total number of students is 40, how many students do not participated in the celebration? Answer: It is known that the number of total students is 40, assumed it as 100%. 70% students do participate in the celebration. It means 30% of stu

Mr. Marsigit gave a great material on last meeting. It was about teaching-learning on school. After giving the material, he asked us to make a reflection about the material and he asked us to add more material from other source. So this is the reflection. In teaching-learning process, there are ten elements. These things are very close to each element. In this time, I will try to write how to do these things in junior high school. The material is plane geometry. 1.        Lesson Plan Lesson plan is made to facilitate teaching-learning process in class. Lesson plan makes teaching-learning activity goes easier and effective. Teacher makes certain about the topic, then make idea that what to discuss in class. Teacher makes activities to do in class. Teacher finds material that needed. If we want to teach about plane geometry for junior high school, we have to find the text book as the basic when we teach. We can ask the students to compare the construction of rectangle and squ