Activities and guidelines:
1, consolidate the existing knowledge:
Ask the children to watch the exhibition boards arranged in the last activity to consolidate their understanding of the harm of pesticide residues. Ask two delegates to explain the information about children.
2, understand several methods to remove pesticides:
(1) Ask the children's group to exchange the collected information and talk about what they have learned.
(2) Children can freely display materials, and materials in the same way can be pasted on the display board at the same time. Four methods are summarized: soaking, peeling, brushing and heating.
(3) Group discussion: Which method is the best?
(4) Each group sends a representative to talk about their own ideas, and other groups evaluate them. (For example, in the first group, the peeling method is good and the pesticides are completely removed. Some children in other groups hold objections, thinking that peeling with a knife is easy to cut their hands; However, some children support that peaches and mangoes can be peeled directly without danger.
[Concern] A. Pay attention to whether children can actively participate in the discussion.
B, pay attention to whether children dare to express their ideas when evaluating.
3. Deepen the understanding of several methods in practice.
(1) The teacher guides the children to understand that each method has suitable and unsuitable fruits and vegetables, and different methods should be selected according to the different characteristics of each fruit and vegetable.
(2) Please ask each group of children to choose suitable fruits and vegetables according to the method just chosen, and tell what they have chosen, and the other groups will evaluate them.
(3) Teacher's summary: Some fruits and vegetables can be removed in various ways.
4, healthy food lunch box
Ask children to choose appropriate tools and methods, remove pesticides from all kinds of vegetables and fruits as much as possible, and taste them at will after processing.
Suggestion:
1, activity organization and guidance: Teachers can also list the collection tools as separate activities, so that children can collect this information and have discussions and exchanges.
2. Extension and expansion of activities:
(1) Extension and expansion of relevant experience: it can be extended to green food and environmental protection.
(2) Extend and expand the organic infiltration of daily life, and guide children to pay attention to food hygiene in daily life.