Producing robust programs – OCR GCSE Computer Science (6 lessons)

6 ready-to-teach lessons for OCR GCSE Computer Science (J277): Producing robust programs. Every lesson has editable PowerPoint slides, a student worksheet and full answers, and the bundle costs less than buying the lessons one by one. A complete, ready-to-teach bundle for OCR GCSE (9–1) Computer Science (J277): Section 2.3 Producing robust programs, in 6 bespoke lessons. Every lesson comes with: - **Editable PowerPoint slides**: goals, starter, explanations, diagrams, worked examples, a quick check, a task and an exit ticket, with teacher notes - **Student worksheet (Word)**: recall, applied practice and exam-style questions with marks - **Answer sheet (Word)**: full mark-scheme style answers Worth £29.94 if bought lesson by lesson. ## What's inside - **OC2.46** Defensive design and authentication - **OC2.47** Input validation - **OC2.48** Maintainable code - **OC2.49** ����Vlogting and types of error - **OC2.50** ����Vlogt data and test plans - **OC2.51** Refining algorithms ## Why teachers use it - Mapped lesson by lesson to the specification, so coverage is easy to track - Python 3 throughout, with the OCR Exam Reference Language alongside - Fully editable: adapt to your class, timings and school template - Works for teaching, revision, cover lessons and homework These are independent resources written for the Cambridge OCR GCSE (9–1) Computer Science specification (J277, version 3.1). They are not produced or endorsed by OCR or Cambridge University Press & Assessment. Spec point numbers are our own numbering of the specification statements. Last updated: November 2026.