There are also shortcuts to success: a teaching "opens the road" and cannot be without "divine assistance"
Release time:
Jan 28,2018
"Hands-on experiments are very intuitive and visual, and without hands-on experiments, guessing is nonsense. In every aspect of teaching, students should try their best to arrange hands-on experience, so that students can acquire knowledge easily. In this way, the flower of guessing can be 'tentacle." He has always adhered to this concept in teaching.Li Jin is a senior physics teacher and subject leader in middle schools in Jiangsu Province.He has been engaged in junior high school physics teaching for 20 years and is currently working in Pizhou Bayiji Junior High School,A more in-depth study of innovative experiments, Published dozens of articles in national and provincial journals, and participated in lectures at the Jiangsu Provincial Teacher Training Center as a specially invited expert.
He usually pays attention to experimental teaching, arranges as many students as possible in the teaching process, and often improves the shortcomings of traditional experimental teaching aids,Self-research and production of innovative teaching aids to stimulate students' interest in scientific exploration. Coincidentally, from December 12 to 14 this year, Jiangsu province held the first junior high school physics experiment innovation appraisal and experimental teaching special seminar, which was made by teacher Li Jin."Using sensors to study vacuum can not transmit sound". Experimental teaching aids were given the opportunity to be publicly displayed.
Can a vacuum deliver sound?Teacher Li Jin teaches you how to verify it.
On the moon, although the astronauts are very close, they still use the radio to talk. The reason is simple: there is no air on the moon, and the vacuum cannot transmit sound.
Then how to use experiments in the classroom to visually present the phenomenon of "vacuum can not transmit sound", so that students are more convinced of this theory? Traditional experimental teaching aids. Medium The noise of the pumping machine is very loud, the interference caused by the experiment is large, moreover, simply. The loudness of the sound is perceived by the human ear, which cannot accurately present the experimental data. However, Mr. Li Jin, a senior physics teacher and subject leader in middle schools in Jiangsu Province, did this:
Mr. Li Jin showed his self-made experimental teaching aid of "using sensors to study vacuum and no sound transmission" at the innovation appraisal site of physics experiments in early 2018 in Jiangsu province. he innovatively adopted it. The refrigerator compressor has little noise when pumping air and has little influence on the experiment. The magnetic levitation display table is also used to separate the sounding body from the base, thus avoiding solid sound transmission.
Of course, More importantly, the SWR sound intensity sensor and pressure sensor are used to accurately measure the experimental data. The collected data are presented visually in the form of images through the SWR digital information system, and the experimental conclusions are more convincing. In this way, the flower of conjecture becomes "tentacle" available.
SWR Digital Experimental Instrumentmuch. Concern highly appreciated by the Group of Experts
With innovative experimental teaching aids, Mr. Li Jin won the first junior high school physics experiment teaching aids innovation evaluation in Jiangsu Province.First Prize.
Famous Teacher-Li Jin
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