How to collect leaves in middle school science last semester

(1) Stimulate children's interest in viewing leaf specimens.

1. The teacher and the children sang the song Little Leaves together.

2. Teacher: Children like all kinds of leaves. They picked up many leaves they like. Teachers also like all kinds of beautiful little leaves. Look, these are all fallen leaves that teachers like. Are they beautiful? Do you know their names?

(2) Teachers guide children to know and appreciate leaf specimens and understand the significance of making specimens.

1. Guide children to observe the difference between leaf specimens and fallen leaves.

Teacher: Are these leaves the same as those just picked by children? What other nice names do these leaves have? (leaf specimen) 2. The children watched the leaf specimens.

(1) The teacher guides the children to know the leaf specimen: Have you seen the leaf specimen? Where have you seen it?

(2) Teacher: Why do people collect leaves as specimens? What's the use of specimens?

3. Teachers and children * * * Summary: Specimens, like photos, can make people know many different plants more clearly, which is very convenient. Leaf specimens will not wilt and rot, and can be preserved for a long time.

(3) Play video to let children know the simple method of making leaf specimens.

1. Let the children guess and talk about the method of making leaf specimens.

2. Watching the video, the teacher affirmed the child's existing experience.

3. Focus on the preparation of leaf specimens.

(4) Teachers and children arrange leaves together to prepare for making leaf specimens.

Guide children to complete the preliminary work of making leaf specimens according to the following procedures: select complete and flat leaves-wipe them clean with a rag-dry them with crepe paper-clamp them with thick old books.

Activity expansion:

1. Daily infiltration: lead children to change crepe paper for leaves regularly, and make specimens after observing that leaves are completely dry for a few days.

2. Family education: let children know the methods and steps of making leaf specimens from their parents; Parents use the book "Specimen of Leaves" for their children to guide them to further perceive the process of making leaf specimens.

3. Regional activities: Provide various leaf specimens in the scientific activity area for children to know.