
Classes and objects lesson for Cambridge International AS & A Level Computer Science (9618), with editable PowerPoint slides, a student worksheet and full answers. A class is a template and an object is one instance of it; students write classes with properties and methods and create objects.
Written for Paper 4 Practical, section 20 Further programming (syllabus 20.1.2 c). Everything is editable, so you can adapt it to your class.
What’s included- PowerPoint lesson (14 slides) with teacher notes on every slide
- Student worksheet (Word), ready to print or edit
- Answer sheet (Word) with mark-scheme style answers for every question
By the end of the lesson students can:
- Define class, object, instance, attribute, method and constructor
- Write a class with a constructor and methods in Python, then create and use objects
- Write the same class in Cambridge pseudocode with CLASS, PUBLIC and NEW
Worksheet sections: A. Key words; B. Read and predict; C. Amend the Book class; D. Exam-style questions; E. Challenge
Every lesson includes- Learning goals and a starter question
- Clear explanations, diagrams and worked examples (Cambridge pseudocode, as in the 2027–2029 pseudocode guide, with Python alongside)
- A quick check and a “your turn” task linked to the worksheet
- Exam-style questions with marks, and an exit ticket
- PowerPoint (.pptx) and Word (.docx), fully editable
- Works in PowerPoint and Google Slides
- Calm, muted sixth-form design, consistent across the whole course
These are independent resources written for the Cambridge International AS & A Level Computer Science syllabus (9618) for examination in 2027, 2028 and 2029. They are not produced or endorsed by Cambridge University Press & Assessment. Syllabus point numbers are our own numbering of the syllabus statements.
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Last updated: November 2026.
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