2.4 Function Machines GCSE PowerPoint Lesson

In this 28-slide lesson, students will be introduced to the concept of function machines as a visual and structured way to understand how inputs are transformed into outputs using mathematical operations. Pupils will explore one-step and two-step function machines, using operations such as addition, subtraction, multiplication, and division. The lesson will focus on identifying the rule of a function, completing input-output diagrams, and working backwards to find missing values by using inverse operations. Through engaging activities and problem-solving tasks, students will develop a strong foundation in functional thinking—laying the groundwork for more advanced topics such as equations and graphs.

The lesson includes:

• Clear, guided examples

• Discussion opportunities from Think, Pair, Share

• Mini whiteboard section to check understanding and clarify misconceptions

• Two structured tasks to practise key skills

• Challenge activity to extend and deepen learning

Perfect for engaging learners while reinforcing essential algebra concepts.