IB Computer Science 2027 – B3.2.2 Polymorphism – Lesson & Worksheet

Bespoke, fully editable lesson for the new IB Diploma Computer Science syllabus (first assessment 2027): B3.2.2 Polymorphism. Slides, worksheet and full answers.

Written for the 2027 IB Computer Science guide, unit B3 Object-oriented programming (HL only). Everything is editable, so you can adapt it to your class.

What’s included

• PowerPoint lesson (12 slides) with speaker notes on every slide
• Student worksheet (Word), ready to print or edit
• Answer sheet (Word) with model answers for every question

B3.2.2 Polymorphism

By the end of the lesson students can:

• Explain polymorphism and why it makes code flexible
• Use method overriding for dynamic (run-time) polymorphism in Python
• Explain static polymorphism (overloading) and how Python handles it

Worksheet sections: A. Key ideas; B. Predict the output; C. Add a class; D. Overloading in Python; E. Challenge

Every lesson includes

• Learning goals and a starter question
• Clear explanations with worked examples (Python where code is needed)
• A quick check and a “your turn” task linked to the worksheet
• An exit ticket

Format

• PowerPoint (.pptx) and Word (.docx), fully editable
• Works in PowerPoint and Google Slides
• Calm pastel design, consistent across the whole IB course

These are independent resources written for the IB Diploma Programme Computer Science guide (first assessment 2027). They are not produced or endorsed by the International Baccalaureate Organization.