Activity goal1.Know and identify the production date and safety signs on food packaging, and distinguish which foods are safe and which foods have potential safety hazards. 2. Enhance food safety awareness, improve children's food safety self-protection ability, and cultivate children's good eating hygiene habits. Activity preparation 1. Teaching courseware "Eat healthy food" 2. Some pictures (healthy food-vegetables, fruits, nuts; Junk food-fried food, canned food, pickled food, processed meat food, fatty meat and animal offal food, cream products, instant noodles, barbecue food, frozen dessert, preserved fruit, preserved plum and candied fruit food; Expired food-moldy and spoiled food). 3. A number of health adventure game chessboards. Teaching focuses on knowing the importance of healthy diet and developing good dietary hygiene habits. Difficulties in teaching are to recognize and distinguish which foods are safe and which foods have potential safety hazards. Activity process 1, activity introduction 1, conversation introduction topic: What do you like best to eat at ordinary times? Children can answer freely ... (Teachers click on the courseware to show pictures of food one by one) 2. Guide children to sum up: There are all kinds of things you like to eat, but some foods are good for your health, while others are harmful to our health ... 2. Distinguish all kinds of foods 1, Teacher: There are many kinds of foods. Would you like to classify them? (Click on the courseware to guide children to divide food into two categories) (1) Healthy food: fruits, milk and vegetables. (Eating food that is good for human health) (2) Junk food: fried food, instant noodles, jelly, cakes, barbecues, desserts, biscuits, cola, etc. (eating food that is harmful to human health) 2. Understand what harm junk food will do to human health after eating (1) Ask children to talk about: What food do they like to eat at ordinary times? (2) Click courseware to ask children to understand junk food. Children's discussion, the teacher summarized on the basis of children's discussion: Many of the foods we like to eat are junk food, and eating junk food will definitely do harm to our human body ... Therefore, children should eat less or not to eat such food in order to grow up healthily. (3) Question: What other junk food do you know? (Fried food, canned food, pickled food, processed meat food, fat meat and animal offal food, biscuits, cream products, instant noodles, barbecue food, preserved plum and candied fruit food) Teachers will show the junk food mentioned by children one by one with courseware to help children learn more about more junk food varieties. Third, distinguish the food safety label 1. Question: What food can't be eaten except junk food? (Ask children to discuss and answer questions) 2. Ask children to watch the courseware (the picture of children having stomachache after drinking expired milk) Teacher: What happened to him? Why is this happening? Summary of guiding children: when we buy food, we must see the shelf life of the food on the packaging bag clearly. We can't eat expired food, otherwise it will cause physical discomfort and may be dangerous.