李晓浏Science4A-Ch10

1、Period Teaching PlanWeek dayDec. 2005Teaching planner李晓浏Teaching executorTeaching materialChapter 10 FruitTeaching aims1. To know that fniit is made up of fruit wall and seeds.2. To learn some common kinds of fruit.Key points1. Fruit is made up of fruit wall and seeds.2. Some common kinds of fruit.D

2、ifficulties pointsNew words, basic knowledge about fruit.Teaching aidsPictures, OHC, computerTeaching approachDirect method, experiments.Teaching ProceduresPersonal ViewStep 1 RevisionReview what has been learned in the last Chapter.Questions:1. Why do plants need to spread their pollen ?2. How do s

3、ome plants spread their pollen by wind?3. How do some plants spread their pollen by insects?Step 2 Presentation1. Pre-task: Do you know how a fruit is formed?Let students give the answers and guide them to discuss.2. Finding out: (using pictures) Show the pictures of a fruit of the pepper.Ask the fo

4、llowing questions:How is a fruit of the pepper formed?What will the ovary grow into?Which part of the flower will grow into the seed?What is the function of the sepals?What will happen to the stamens and petals when the ovary rows into a fruit?When the fruit is formed, what happened to its colour?Le

5、t the pupils discuss about the procedures how a fniit is formed, using the given pictures.(groupwork)Teaching ProceduresPersonal View Show the pictures of the cross-section of pepper.Ask：How many parts are there in a fruit?(A fruit is macle up of the outer wall, middle wall and inner wall.)How many

6、parts are there in a seed?(The seed has a seed coat, an embryo and seed leaves.)Step 3 ExperimentExperiment 1: Show the pictures of water melon, an orange and a grapefruit. Ask:Which fruit has reel juice? Which fruit has yellow juice?Experiment 2: Show the pictures of bananas, persimmon and honey me

7、lon. Ask:Which fruit has the hardest wall and which has the softest?Experiment 3: Show the pictures of a papaya, a lemon and a mango. Ask:Which fruit has the most seeds? Which has the biggest seed?Help the kids to draw the conclusion: Different plants have different fruit and seeds.Step 4 MainpointsAsk the students to read the sentences in this part.Let them guess the meaning of these words: receive, seed leaves, embryo.Explain any que