1. LESSON PLANSchool : SMP Negeri 3 SurabayaSubject : MathematicsGrade/Semester : IX/1Time : 4 x 40 minutes (2 meetings)A. Standard Competency2. Understanding the properties of cylinder, cone and sphere and determiningits sizeB. Basic Competency2.3 Solving the problems that are related to cylinder, cone, and sphereC. Indicator1. Solve the problems related to surface area of cylinder, cone and sphere2. Solve the problems related to volume of cylinder, cone and sphereD. Learning ObjectiveFirst meeting1. Given some problems related to surface area of cylinder, cone and sphere,the students are able to solve the problems correctly.Second meeting2. Given some problems related to volume of cylinder, cone, and sphere, thestudents are able to solve the problems correctly.E. MaterialFirst meetingThe surface area of cylinder, cone, and sphereSecond meetingThe volume of cylinder, cone, and sphereF. Learning ModelFirst meetingDiscussion learningSecond meetingDiscussion learning
2. G.Learning ActivityFirst meetingIntroduction (± 5 minutes)(Phase 1: Clarify aims and establish sets)1. Teacher generally presents the learning objective that is solving problemsrelated to the surface area of cylinder, cone, and sphere.2. Apperception: Leads the students to recall the material that had beenlearned before and correspond with the material that will be discussed suchas the formula of surface area of cylinder, cone and sphere.3. Motivation: Motivates the students by relating the material that beingdiscussed with real life situation.(Phase 2: Focus on discussion)4. Teacher explains to students that in this meeting we are going to discussabout how to solve problems related to surface area of cylinder, cone andsphere.5. Teacher divides the class into 5 heterogenic groups.6. Teacher gives a worksheet to each group and asks them to do theworksheet.(Phase 3: Hold the discussion)7. Teacher asks students to discuss with their groups.8. Teacher asks some students to show their work and asks the others to giveopinion, comment or suggestion.(Phase 4: End the discussion)9. By recitation, students are followed in making a decision about this learningor from the discussion.(Phase 5: Debrief the discussion)10. The students asked to review their discussion process, using somequestions below;a. What is your opinion about the discussion today?
3. b. Do you give any chances to your friends to participate in discussionprocess?c. Do you appreciate to others opinion whether it’s different or no?