"What an interesting lesson!". I attended at secondary school when I was 14 or 15 years old.
It was quite a long time ago, so I can't remember every detail, but the lesson was about respiration. We learnt about how the lungs work, how we breathe, and how oxygen passes into the blood. The science teacher also talked to us about the effects of smoking on the lungs.
I found this lesson interesting because my science teacher, Dr. Smith, always introduced new topics by showing us a video. We watched a short film about how respiration works, and I found this much easier to understand than a science textbook. The film showed diagrams of the lungs to explain the breathing process. Later in the lesson we saw real photos of healthy lungs and lungs that had been damaged as a result of smoking; they had turned black. I think the image of a smoker's lungs is the reason why I remember this lesson.
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