Producing Robust Programs | OCR GCSE Computer Science J277 | PPT, Worksheet, MCQs, Answers

A complete, exam-focused teaching bundle on producing robust programs for OCR GCSE Computer Science J277 (Section 2.3). It gives you everything needed to teach defensive design, testing and debugging in one package.

What’s included

PowerPoint (7 slides): teaching content, worked examples, pseudocode, suggested visuals, quick-check questions and exam tips, with teacher notes in the speaker notes.
Worksheet (91 marks): error identification, test-data and validation questions, test-plan exercises, trace tables, debugging, code analysis, pseudocode writing, program improvement, scenarios and exam-style questions, including a 6-mark level-of-response question.
Practical activity: a cinema ticket kiosk program with a hidden boundary logic error and missing validation. Students analyse it, choose test data, find the faults and write a more robust solution.
25 MCQs: four plausible options each, in a separate student file with an answer grid.
Teacher answers booklet: full mark schemes, activity guidance, and an explanation, misconception and difficulty rating for every MCQ.
Exam masterclass: testing and debugging checklists, validation versus verification, test-data techniques, common programming mistakes, full-mark model answers and exam errors to avoid.

Topics covered: defensive programming, validation, authentication, maintainability, readability, naming conventions, iterative and final testing, test plans, normal, boundary, invalid and erroneous data, syntax, logic and runtime errors, trace tables, selection, iteration, variables, constants and arrays.

Format: editable PPTX and Word (DOCX) files, A4, written in British English. It suits KS4 lessons, revision, homework, cover lessons and assessment.