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Talk about interesting scientific factsGreeting
Talk about interesting scientific facts
课堂的开始给学生介绍有关科学的趣事，既能活跃气氛，还可以把学生迅速引入课堂，带着问题去探索本科所学。而且，有关科学趣事的讲解还能增进与学生之间的关系。
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Presenta-tion
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?…?1. Show the learning aims
2. Play the record
3. Explain the important and difficult language points
4. An experiment reporter and a little scientist show the experiment
5. Make a conclusion
6. Show the rules about fraction1. Read the learning aims
2. Listen to the record then order the steps of the experiment;Finally, ask number three from each group to write down their answers
3. Answer the questions from the teacher
?4. One student from one group speak out the steps