The Development And Application Of The Hand-held Technology In Middle School Chemistry Experiment Teaching Cases

With the development of science and technology,Hand-held technology is applied in teaching,which can make students understand the experimental phenomena and characteristics more intuitive,can cultivate and can improve students' ability of information literacy.In order to Make up for the shortcomings of traditional experiment,and bring into full play the advantages of hand-held technology in chemistry experiment teaching in middle school,the author in this paper explores the experimental teaching mode based on literature research and develop four experimental cases with Hand-held technology: Firstly,potassium nitrate solubility increased with temperature rising is prove by the hand-held technology.Secondly,metal active is measured based on the hand-held technology.Thirdly,the conductivity of the electrolyte is measured based on the hand-held technology.Fourthly,the factors of phenol and ferric chloride reaction equilibrium are measured based on the hand-held technology.The combination with the characteristics of the hand-held technology and optimizing the experimental process,is to present the change in the experiment in a more intuitive,clearer way to the students.Hand-held technology has significant advantages,students to learn with technology,learning interest,learning motivation is strong,can fully arouse the enthusiasm of students' learning.It is very effective to improve the teaching effect.In order to cultivate the students' observation ability,the practice ability,the effect is stronger than the traditional experimental technique.In the process of classroom practice,the experiment contents are designed in a reasonable and detailed way in teaching.Teaching cases are analysed,optimized and redesigned.Distributing the questionnaires to students after class is to know students' feeling and opinion to hand-held technology,its impact on student's learning attitude and their willingness to learn it.Through teaching activities,hand-held technology makes teaching way shift from "qualitative" teaching into "quantitative" one,which also helps students understand chemistry concept,draws students' attention in learning,and improve students' interest in learning.It can improve students' experiment skills,build up the quality thinking,cultivate students' innovation consciousness,divergent students' thinking and shape students' knowledge in a continuous and developing way.