The spatial structure of organic compounds (3D molecular structure) acts as an important tool in teaching organic chemistry. This study designed 16 3D molecular structures of hydrocarbons and chemical reaction simulations, using these simulations to design teaching plans for alkenes; guide teachers on how to use the teaching plans; and develop tests to assess students’ chemistry competency. The research aimed to evaluate the impact of using 3D molecular structure simulations on students’ development of chemistry competency. The methodology was conducted on 630 Vietnamese students divided into two groups: an experimental group and a control group. The results of this study have demonstrated the benefits of 3D molecular structure simulation, including enhancement of students’ chemistry competency, promotion of transfer and application of spatial chemistry content to higher-order concepts, and expansion of the planning of the nature and mechanism of chemical reactions. As a result, chemistry teachers can use 3D molecular structure simulation to teach topics such as atomic radius, bond length, and bond angle. This research makes an important contribution to the application of technology in teaching and developing chemistry competence for Vietnamese high school students.
This article investigated the general structure of teaching competencies and integrated teaching competencies of natural science teachers in high school education, the actual situation of integrated teaching in Vietnam and some other countries in the world, and the designing of assessment templates to recognize difficulties of natural science teachers in integrated teaching. It is shown that natural science teachers are facing various challenges in integrated teaching: a lack of professional knowledge and skills in building integrated topics and teaching with this approach, problems in putting integrated teaching techniques into practice. On this foundation, the article presents a procedure for building an integrated teaching competency framework for natural science teachers, then proposes such a framework. This framework consists of 4 competencies and ten criteria with detailed indicators. Natural science teachers can use this framework to develop tools (checklists, rating scales, or questionnaires) to assess their integrated teaching quality and their “colleagues”, henceforth fostering their competencies as required by the General Education Program.
At present, with the development of computer science and in the context of the fourth industrial revolution, technology products are used in all fields. In the field of education, more and more pieces of software and applications that support teaching are created, and one of them is e-books. E-books are documents which can flexibly and efficiently provide students with information and instructions in the form of multimedia and therefore can support and improve learning. The article presents the process of using Kotobee Author software to build e-book contents and using e-books to teach integrated topics in teaching chemistry with a view to developing self-learning ability for students.
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