Application Research Of Handheld Technology In Chemistry Project-Based Learning In Senior High School

Under the background of "implementing the fundamental task of moral education and further promoting quality-oriented education",project-style learning has been gradually promoted and implemented all over the country,and more and more educators have begun to try to practice and use project-style teaching methods.At the same time,schools at all levels and of all types in China continue to enrich the application scenarios of digital education and promote the integrated development of digital technology and traditional education.A lot of middle schools are equipped with hardware and software facilities for digital experiments of handheld technology,and have the rigid requirements for carrying out digital experiments of handheld technology.But currently based on project learning handheld technology digital experiment development and practice,the study after preliminary literature,design and practice the "handheld technology to explore the chemical principle behind dental medicine","reveal ’explosive salt（main components for sodium super carbonate,chemical formula is 2Na₂CO₃·3H₂O₂）","design 84 disinfectant use precautions" three course cases,through the analysis of the questionnaire survey and teachers’ interview,case practice achieved the desired effect.The combination of project-based learning and the digital experiment of handheld technology can effectively promote the development of students’ core literacy in chemistry.This study includes five parts:Introduction:This part mainly includes the research background,research purpose and significance,domestic and foreign research review,research ideas and methods.Concept definition and theoretical basis:It mainly expounds the related concepts of project-based learning and digital experiment of handheld technology,and takes Spencer’s scientific education thought,Dewey’s "learning by doing",Tao Xingzhi’s "life education" thought,constructivism learning theory and multiple intelligence theory as the basic theoretical support of this paper.Course case design and implementation:Through the element analysis of project-based learning and handheld technology digital experiment,three teaching cases are designed."Hand technology to explore the chemical principles behind dental medicine" through the use of conductivity sensor,pH sensor tooth——hydroxyapatite,the main of the knowledge of precipitation dissolution balance;"reveal" explosion salt "to help businesses to eliminate the "explosion salt" situation,temperature sensor,oxygen sensor to explore the related properties of sodium percarbonate;" design 84 disinfectant " use redox potential sensor,pH sensor to explore the influence of acid,alkaline,light,temperature and other factors on the bleaching effect of sodium hypochlorite solution.Practice process and result analysis.The case teaching practice was conducted in high school,the questionnaire survey of pre-test and post-test was conducted for students,the questionnaire results were processed through SPASS22.0 software,teacher interviews were conducted,and the interview content was recorded and analyzed.Research conclusions and prospects:Project-based learning optimizes classroom teaching in terms of teaching strategies and methods,while the digital experiment of handheld technology provides a guarantee for classroom teaching in terms of hardware resources.The two complement each other.This paper provides an important teaching case for the combination of project-based learning and handheld technology digital experiment.The combination of handheld technology digital experiment and project-based learning can improve students’ core literacy of "macro identification and micro analysis"and "scientific inquiry and innovation consciousness".