Python Control Flow & Code Tracing Worksheet | KS3 / GCSE Computer Science

Complete, print-ready Python Control Flow & Code Tracing worksheet with a full Teacher Answer Key. Designed for KS3 and GCSE Computer Science students to practice trace tables, nested loops, conditional logic, and debugging.

This comprehensive resource helps students master tracing variable states step-by-step and identifying real-world programming logic errors.

What’s Included:

• Section 1: While Loops & Condition Tracking – Step-by-step variable trace table practice.
• Section 2: Nested Loops & Modulo Logic – Dual-variable tracking with condition evaluations.
• Section 3: Bug Identification & Debugging – Real-world code scenarios focusing on division-by-zero edge cases and loop validation.
• Section 4: Algorithm Design Challenge – Structured space for writing a standard FizzBuzz control flow algorithm.
• Teacher Answer Key: Dedicated solution page with fully populated trace tables, step-by-step line updates, and code solutions.

File Formats Included:

• .docx – Fully editable Microsoft Word document for customizing questions or layout.
• .pdf – High-resolution, print-ready version with fixed formatting.

Ideal For:

• Main classroom teaching & structured independent practice
• Homework assignments & revision sessions
• Cover lessons (includes step-by-step solutions for non-specialist cover staff)