At this stage, junior high school biology is a minor subject in the eyes of students. Some students think that they will not take the senior high school entrance examination, so their learning purpose is not clear and their learning initiative is poor. How to change this situation depends largely on teachers' language expression ability and teaching methods. Only vivid, concise, accurate and interesting language can attract students like magnets, stimulate their interest in learning, achieve satisfactory teaching results, and really get twice the result with half the effort. Combined with more than ten years of practical teaching and the physical and mental characteristics of junior high school students, I think we can carry out interest teaching from these aspects. 1, Pay attention to the value of biology At present, biology has entered an era of rapid development with each passing day, and the use value and development potential of biological knowledge are gradually recognized and valued by people. The teachers talked about the application of biological knowledge in agriculture, medicine and health, industry and national defense, and introduced the prospect of "Dolly" technology of cloned sheep, which urged students to learn and explore biological knowledge with great enthusiasm. 2. Use humorous language to teach teachers to overcome monotonous and boring words in teaching, and make full use of easily accepted and understood languages such as poems, famous sayings and epigrams, so that students can spread their wings of association and soar in the sky of biological knowledge. For example, when talking about the development of insects, I asked the students if the poem "Silkworms will weave until they die in spring" is correct. The students may be right. I ask again, did the silkworm die after spinning? Students respond, so it is easy to grasp the abnormal development. 3. Appropriate audio-visual teaching methods should be adopted in the teaching of learning knowledge in happiness. For example, students should read Animal World and useful extracurricular books, and teachers should integrate the biological knowledge in novels and stories collected in their spare time into teaching. In a pleasant atmosphere, students will have a strong interest. For example, proverbs such as "Dragon gives birth to dragon, phoenix gives birth to phoenix" and "One mother gives birth to nine children, even ten mothers" will make students understand the difficult genetic variation at a glance. 4. Using models, wall charts and other teaching AIDS in teaching, teachers use models, specimens, wall charts and other teaching AIDS to turn abstract into concrete and complex into simple; The static state is transformed into dynamic state by electrochemical means. For example, when talking about human blood circulation, students can easily understand the mutual transformation of systemic circulation and pulmonary circulation, as well as the mutual transformation of arterial blood and venous blood by observing the "human dynamic blood circulation model". The teacher's full enthusiasm infects the students. Teachers devote themselves to teaching with great enthusiasm, create a relaxed, harmonious and pleasant classroom atmosphere, set an example everywhere, be a teacher, moisten students' hearts with spring rain, love me, love my dog, and make students interested in biological knowledge. 6. Pay attention to practical activities and cultivate practical ability. Biology is a practical subject, and teachers should guide students to practice more. After school, you can do some planting and breeding experiments, collect some biological specimens, guide students to write some small biological papers, and make some small teaching AIDS yourself, which will enhance students' self-confidence and innovative spirit over time. 7. Don't let students recite a lot of biological knowledge in junior high school, but there are inherent rules in memory. A good memory method can improve the memory effect. For example, the jingle "the middle valve between the upper atrium and the lower ventricle, and the atrium is connected with the venous ventricle" vividly tells the basic structure of the heart-the atrium is above, the ventricle is below, and the atrioventricular valve is in the middle; Atrium is connected with venous blood vessels, and ventricle is connected with arterial blood vessels. 8. Objective evaluation. The innate and acquired qualities of students vary from person to person. In teaching practice, teachers should make an objective evaluation and encourage students to "cross the sea with eight immortals and show their magical powers". Timely evaluation will make students more interested, such as "adding meals" to gifted students, and it will be done on the next level; Praise the bright spots of poor students, let them get out of the bad psychology of broken pots and fall, and catch up. In short, students are ever-changing and the situation is different. However, as a teacher, as long as the teaching methods suitable for junior high school students are adopted under the premise of teaching routine, the enthusiasm and initiative of students are fully mobilized, and each student can give full play to his potential, so as to achieve good teaching results; Students can also learn the essence from the vast ocean of knowledge, constantly enrich and improve themselves, and cultivate their learning and inquiry abilities.