First, the current situation of junior high school biology experiment teaching

Biological experiment teaching in junior high school is an important teaching and training means to cultivate junior high school students' subject literacy and scientific skill exploration. In 1960s, the basic methods and principles of biological experiment teaching have been reflected in the teaching materials. In the teaching reform in the United States, Japan and Britain, although the methods are different, they are all regarded as the key research and application objects. After 2000, the curriculum reform concept of "active participation, diligent hands-on, good at processing information, good at analyzing and solving problems, good at cooperation and communication" in the "Biology Curriculum Standard for Ordinary Junior Middle Schools" promulgated by the education department of our country has been deeply rooted in the hearts of the people. In the all-round development of the subject, biological experimental teaching also keeps pace with the times, and the concept of new curriculum standards is infiltrated into experimental teaching. Nevertheless, the teaching method is single, and the teacher-centered experimental teaching is being widely adopted by the society. Old experimental teaching content is the bottleneck of students' academic literacy. Teaching based on this is produced on the basis of teachers' thorough understanding of teaching materials, and students have no enthusiasm to participate in teaching practice extensively.

Second, the purpose and significance of the simulation experiment research

Simulation experiment is an experimental teaching platform based on the physical and mental development of junior high school students, and it is a strategic innovation of junior high school experiments. The main purpose of its research is to face all junior high school students, improve the literacy of biological science, and infiltrate inquiry learning into specific research forms. Compared with the actual demonstration experiment, the simulation experiment does not need to waste precious biological materials, can save students' expenses, and is simple and easy to operate. Students can intuitively understand the phenomena that can't be understood by their senses, and can help them form their own way of thinking, from the whole to the part, from the macro to the micro, and to spy out the specific experimental principles from simple experiments. It is the requirement for junior middle school students to adapt to the needs of modern life and future development, and it is also the requirement for focusing on reform, tapping the innovative function of experimental teaching and cultivating students' innovative spirit and practical ability.

Third, the application of simulation experiment in junior high school biology experiment teaching.

The biological experiment course runs through the concrete experimental teaching by using multimedia computer simulation technology, which is an interactive situational teaching integrating multimedia, teachers and students. The development of its software technology and functions has been applied to modern biology classes, which has brought infinite surprises to students and greatly improved their interest in learning. In the model teaching scene, students can freely observe the experiment, give full play to their imagination, innovate their skills under the correct guidance of teachers, constantly discover problems, ask questions and solve problems, and finally verify their experimental ability. For example, the experiment of "plant tissue culture" can't spend a lot of time and energy to organize the collection experiment in class, which not only wastes students' time and energy, but also is difficult to organize. Simulation experiment is a course that realizes synchronous experiment and scientific demonstration based on the high-tech connotation of modern computer software. This process of continuous demonstration not only enlivens the classroom atmosphere, but also makes students look forward to exploring questions and get out of the shackles of book theory teaching and practice teaching. The classroom teaching of biological simulation experiment in junior middle school stimulates students' senses with colorful and changing pictures. From the analysis of modern new teaching methods, this is an intuitive and fruitful teaching. With the help of dynamic teaching, the complexity of biological experiments is overcome, and the teaching content runs through three-dimensional animation technology, so that students can spy on the big world from the micro-simulation small world; Or from the macro environment, witness the process of long grass warbler flying and migratory birds migrating.

From the effect point of view, it can better reflect the value of simulation teaching itself than boring, boring and empty experimental teaching. The setting of analog and digital teaching platform can make the multimedia virtual experiment teaching scene reappear, and let students observe cell wall breaking, human gene mutation, robot operation, IVF, human body structure, ant storage, the growth law of silkworm from pupa to butterfly, and the frequency of butterfly flapping its wings. For these abstract biological concepts, the simulation teaching in digital laboratory is used to break through the limitation of time and space, so as to keep students' eternal passion and prepare them for further understanding of biological habits, structural characteristics and living environment. From the "virtual" of simulation to the "real" of curriculum questions, the changes in different links can make students' thinking break through the limitations of classroom and freely exert their imagination, thus forming an all-round development trend of intelligence and thinking. With the deepening of analog electronic teaching practice platform, junior high school biology experiment teaching has achieved twice the result with half the effort. The practical characteristics of biology teaching make biology teaching different from the intuitive and practical demonstration teaching of other science teaching. Based on the dynamic scheme of new curriculum reform, multimedia digital simulation experiment teaching can better cater to the development characteristics of junior high school students. From the analysis of scientific strategy, it is an effective auxiliary teaching method in biological experiment teaching. From the overall practice, the simulation experiment can not be abused, nor is it omnipotent. In practical teaching, besides planning, it must be organically linked with other teaching methods in order to finally popularize this superior teaching method.

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