Study and understanding of the principles of microorganisms, metabolism of microorganisms, growth of microorganisms, growth factors of microorganisms, microorganisms in food production, microorganisms that cause food spoilage, microorganisms that cause poisoning, and microorganisms that cause infection. Learning is carried out with a constructivist approach. The lesson ended by making a report analyzing the factors causing cases of food spoilage and food poisoning by each student in a group discussion.