This lesson is designed for the NEW AQA Trilogy Biology GCSE, particularly the ‘Homeostasis’ SoW.
 
The lesson begins with a recap on the difference between a stimulus and a receptor and asks students to think>pair>share what the function of photoreceptors might be and where they are found.
 
Pupils are then shown a diagram of an eye, pupils are asked to consider (from a list of structures provided) which labels might go where, they can discuss in pairs and annotate their own diagram if they know for sure. Pupils can then assess their own work when the answers are revealed on the next slide. Pupils must now learn the functions of each of these structures, they will each be given a slip of information about the function of one part of the eye and they should walk around the room and share their information to complete the table in their books. This task can be self-assessed using the answers provided.
 
The next part of the lesson focuses on the pupil reflex, firstly a practical is undertaken whereby pupils block out light from the room and then observe what happens to their partners pupils when they bring a torch to the side of their partners eye. This leads into a description of the pupils reflex, including the role of the circular and radial muscles. Pupils will need to summarise this information by copying and completing the sentences into their book, which can be self-assessed once completed.
 
The last activity is looking at how light is focused on the retina by the lens, pupils are shown a diagram of how this works. After being given a verbal description they are asked to firstly copy the diagram complete with labels and explain how light is focused on the retina using a list of key words that are provided.
 
The plenary task is an exam question on what the students have learnt this lesson, pupils should complete this in silence in their books and then red-pen their work using the mark scheme provided once they have finished.