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High School Biology Department: Yeast Fermentation Challenge

December 12, 2024

On December 11, 2024, the Grade 10 biology class held a yeast fermentation challenge competition. After finishing the study of respiration-related content, teachers of the biology department made an innovative move in the evaluation method, using yeast fermentation, a common phenomenon in life, to examine students' understanding of the processes of aerobic respiration, anaerobic respiration, and their most suitable reaction conditions. This activity also trained students' ability to solve problems in practical application.



Before the competition, students needed to choose one of the two sugar solutions as the raw material for yeast fermentation based on their understanding of the fermentation process. Then, they chose one of the two temperatures as the starting condition for the reaction. Subsequently, students needed to perform various operations to allow the yeast to produce gas through fermentation, thereby inflating the balloon on the beaker flask.




At the very beginning, students were perplexed about how to deal with the sugar solution and yeast cells in the beaker flask. The balloon also did not change significantly. After thinking about the contents learnt in class and life experiences, many students gradually found the correct ways to speed up the reaction. After a while, many students were delighted to see the yeast begin to react, and the empty balloons gradually expanded as they were filled with gas produced by the reaction.



It is worth mentioning that some students found extra tips to accelerate the yeast reaction. They flexibly used various laboratory facilities to strengthen the yeast activities, fully demonstrating their flexibility and divergence of thought.



Finally, the event ended successfully with the students' laughter and celebration. The SHSID biology group will continue to work hard to explore and practice more innovative teaching and evaluation methods to encourage students to actively participate, think flexibly, cultivate biological thinking, and broaden their scientific horizons.







(Written by Xiao Deng   Pictures by teachers of biology department    Edited by Cody Turner    Reviewed by Qian Zuo)