- Planet Earth – which covers: biodiversity, the impact of the human population on the environment, photosynthesis and an insight into habitats, communities and populations.
- The Secret Life of the Cell – which covers: the inner workings of the cell, including cell structure, genetic engineering and the structure of the cell membrane
- The Growth and Survival of Organisms – which covers: mitosis and reproduction in animals and plants.
At the end of S3, pupils will be recommended to sit either National 4 or National 5 Biology.