Practical Research On Problem-based Learning In Junior High School Chemistry Teaching

The new curriculum reform has been going on,the school curriculum structure and curriculum system have been improved.But the dominant position of students has not been particularly effectively highlighted.There is still a phenomenon of passive learning of students.With the implementation of the "double reduction" policy,the amount of homework in the compulsory education stage has been greatly reduced.The effectiveness of the classroom is particularly important.In junior high school chemistry teaching,it will be beneficial if students can ask effective questions,organize them to form core questions and build a problem system around the solution of the core problem to form a learning path.At the same time,it can also cultivate students’ ability to analyze,summarize and innovate problems.This research learns about the current research status of problem-based learning through literature.It also defines the concepts of "problem-based learning","problem system" and other terms.Second,this research identifies the basic flow of problem-based learning in classroom implementation:problem discovery and raising-problem organization and focus-problem implementation and solution-result reporting and sharing.From the discovery,sorting,solving to communication of problems,a complete set of teaching process is formed.Finally,this research selects representative lessons for instructional design.After the teaching practice,the students’ ability to ask questions independently was investigated by portfolio assessment and interview.Concluded as follow:（1）Problem-based learning can improve students’ interest in learning,enhance students’ participation in classroom activities and group discussions,and there is more divergent and creative thinking in the communication between classmates.（2）Problem-based learning can improve students’ ability to ask and solve problems,and cultivate students’ problem awareness.（3）Problem-based learning can reflect the main position of students.It gives full play to students’ creativity and inquiry ability,it can also help students think independently,and actively participate in cooperative inquiry,so that students can become the masters of the classroom.