Students trace real pseudocode line by line and fill in the variable columns themselves — loops, arrays, functions, sorting, searching and more — the exact skill Paper 1 tests and static worksheets can’t mark.
Full description:
Trace tables are one of the few GCSE skills that genuinely can’t be taught by reading about it — students have to practise stepping through code and tracking variable values themselves. This simulator presents 20 real pseudocode exercises, from simple loops through to bubble sort and binary search, with a live table students fill in as they trace and instant marking against the correct execution.
• 20 pseudocode tracing exercises, from foundational (variables, for loops, arrays) through to applied (bubble sort, linear search, binary search, factorial)
• Students fill in a live variable trace table as they step through each algorithm
• Instant self-marking against the correct execution, with a full explanation for every exercise
• Covers the full range of GCSE pseudocode constructs: while loops, nested selection, MOD/DIV, type casting, string slicing, functions with parameters
• Runs as a single HTML file: no login, no install, works on any school device
Use it as a structured homework set building from easy to hard, as exam-technique practice before Paper 1, or as an intervention resource for students who consistently lose marks on trace table questions.