二、紧扣已有的知识基础，Pay attention to novelty
Suspense as a novel stimulus attracts people's attention,Depends on how well people understand it.If people don't understand something novel,Although it may attract attention for a while,But it quickly loses its effect,Can't attract people for a long time.On the contrary, when people have some understanding of a novelty but not complete it,In order to gain further understanding,Will attract strong attention,And maintain this attention for a long time.例Such as,When learning "sex determination and sex-linked inheritance",You can ask students first: "What are the characteristics of the individual development of multicellular organisms?""The student replied: "The fertilized egg."The teacher will ask again: "Why do some fertilized eggs develop into females,Some develop into males?Why is the inheritance of some traits always associated with gender?"Therefore, a situation of "cannot stop" is formed,at this time,The teacher immediately said,To answer these questions,We have to learn "Gender Determination and Sex-related Inheritance".This situation of creating problems,Greatly stimulated students' curiosity and sense of need for the content of this section,It creates favorable conditions for the next successful study.
3. Keep up with students' interests,Attention Tendency
Einstein said: "Interest is the best teacher."No student dislikes guessing riddles and listening to stories.If the teacher passes these vivid opening remarks,Set up a suspicion,Can create an interesting thinking mood,So as to stimulate students' strong curiosity,It will undoubtedly make teaching more effective.Such as,When talking about the "law of free combination of genes",Let me tell the students a story: There is a beautiful lady in America,Refused the courtship of many suave sons,But fell in love with Einstein,And said: "If you and I get married,The offspring born must be as smart as you,As beautiful as me."Just ask,What will happen to their offspring?The students are very interested,I want to get the answer to this question as soon as possible,The determination to "break the casserole and ask to the end" was born,Attracted the students' unintentional attention,Draw the attention of the students to the teacher,The student's thirst for knowledge abounds.
Four, closely follow the characteristics of the times,Mindfulness
Biology must develop social productivity,Gradually improve people's material life and cultural life level services.如，Use the laws of biology to suppress harmful organisms,Develop and protect beneficial animals,For the benefit of mankind,So when we set up suspense,You should be careful not to simply cater to students' interests.To do things that shouldn't be promoted,It should help cultivate students' noble sentiments,Establish lofty ideals,Form a highly professional and hard-working spirit,Unify teaching and educating people organically.
not difficult to see,Set up suspense in the teaching introduction,Not only must have a solid professional foundation,At the same time, there must be extensive knowledge,A wide range of hobbies,Master the psychological status of students,Otherwise, it will be more difficult to achieve the desired effect in just a few minutes.and so,We must always pay attention to collecting various data,Investigate students' hobbies, learning motivation, etc.According to these, the content of each lesson is matched with multiple corresponding suspense to compare,Choose those that are most understandable and interesting for students,Can best transform learning motivation,With novelty,Natural transition,The suspense in the introduction of moderate length,It will definitely produce a better teaching effect,Successfully completed the teaching task of the lesson learned.