Grade 7 and Grade 8: Unlocking life's mysteries through questioning
Biology lessons have always been a space where questions and answers coexist in exploration. This week, pupils in Grade 7 and 8, driven by their curiosity about the living world, actively posed questions and conducted hands-on investigations across various biological themes. Through resolving their queries, they gained a tangible appreciation for the practicality and fascination of biological knowledge.
After finishing the unit on cell structure, Grade 7 students shifted their focus to the broader plant world—plant anatomy and classification. The classroom was filled with curious questions: "How do algae absorb nutrients without roots, stems or leaves?" "Both mosses and ferns reproduce by spores, so what’s the real difference between them?" With these questions in mind, they delved into the distinguishing features of algae, mosses, ferns and seed-bearing plants, and the once-blurred boundaries between different plant groups gradually became clear.
The most exciting part was the peanut dissection lab. "Is the hard shell of the peanut we usually eat a fruit or a seed coat?" "Besides the oil we know, does the peanut kernel contain starch?" With these doubts, students carefully peeled off the peanut pod with tweezers, separated the seed coat, endosperm and embryo, and carefully labeled the name of each structure. The organic substance detection session was even more interesting: when they saw orange spots on the peanut cotyledons after testing for oil with Sudan dye, they immediately cheered, "There really is oil!" When testing for starch with iodine, although they did not see the expected blue color, it sparked a new question: "Is the starch content in peanuts very low?" They took the initiative to ask the teacher about the scientific principle behind it.
Grade 8 students, on the other hand, found the close connection between biological knowledge and life in the theme of "Healthy Living". After finishing the study of infectious disease prevention and the dangers of narcotics, their questions all focused on “practical medical skills": "Can I take antipyretics and cold medicine together at home?" "What side effects will my grandfather have if he takes too much blood pressure medicine?” “When someone is drowning, should I drain the water first or perform artificial respiration first?" These life-derived questions made the classroom discussions extremely lively.
To answer these questions, the teacher not only explained medication safety knowledge with cases, but also led everyone to simulate emergency scenarios: groups practiced cardiopulmonary resuscitation (CPR) steps for cardiac arrest, learned hemostasis methods for bleeding in different parts, and even asked each other questions about "contraindications" while reading the instructions of commonly used home medicines. When the students accurately stated that "press to stop bleeding first before bandaging" and "chest compressions should be done first in CPR", their faces were filled with the pride of "mastering real skills", and they also better understood the meaning of "biological knowledge can protect themselves and their families".