Debug Rescue
Save the fish by fixing Python
Classify the error, locate the faulty line, repair the program and explain the bug.
Welcome
Schools can manage whole classes. Individual pupils can use a personal study licence and keep their own progress.
Teacher
Use an approved Google account to open your teacher dashboard.
Your email must first be added to the approved teacher list in Firestore.
Classroom pupil
Classroom accounts use Google sign-in. You do not need a separate Nat 5 Computing password.
Already joined a class? Use the same Google account each time. Your class code is only needed when you first join.
Personal study licence
Personal Study accounts can sign in with the email address and password attached to their licence.
Password-reset emails are only for Personal Study accounts. Classroom pupils should use Continue with Google above.
Teacher dashboard
Create a class, share its code and view pupil progress.
Teacher access
School pilot access
Your approved teacher account can create and manage classes.
Course access
Nat 5 Computing
Choose your learning route
One course, three ways to study
Personalised retrieval
My spaced practice
Answer a short mixed test chosen from skills you have already learned.
Revision Hub
Approved flashcards with spaced retrieval
Type an answer before comparing it with the accepted National 5 wording.
Computing Arcade
Play what you are ready for
Short games unlock alongside your Python, database and computer-systems skills.
Daily Mastery
Make me genuinely fluent at Computing Science.
Short prescribed practice based on what you know, what is due, what needs repair and what you are ready to learn next.
Adaptive starting diagnostic
Start at the right level
A short adaptive check places Python, SQL and Computer Systems independently. You can retake any area later.
Today's prescription
Build today's practice
Adaptive placement
Starting diagnostic
Questions move up or down automatically. This is a placement check, not an exam.
Computing Arcade
Play what you have unlocked
Arcade cabinets use the same Computing Science skills as the course. School teachers control when the Arcade is open.
Choose practice
Stay on unlocked skills — or rehearse your next step
Next-skill practice is deliberately practice-only. It does not let a pupil skip or unlock the main pathway.
Debug Rescue
Repair the program before the shark reaches the fish
Diagnose, locate, repair and explain. Correct behaviour matters — your code does not have to match one exact solution.
Training mode — no timerStage 1 · Diagnose
Click the line where the problem begins:
Stage 2 · Repair
Logic Showdown · Judge Edition
Decide who moves on
Work through AND, OR and NOT using truth tables, Python conditions and visual judges.
🕹️ Computing Arcade
Arcade game
Fast practice from skills you have reached.
1/8
0 pts
Streak 0
Question
Revision Hub
Retrieve, compare and space
Your typed answer stays visible beside the accepted wording. You decide how securely you recalled it.
Select topics
Personalised spaced practice
Your mixed retrieval session
Questions are selected from your due skills, previous answers and class misconceptions.
Personal to you
Skills you found difficult return sooner.
Mixed practice
Older topics are mixed with recent learning.
Class-informed
One common class misconception may be included, without showing individual classmates' data.
Anonymous peer check
Mark a classmate's response
No written feedback is needed. Click words in the pupil answer to highlight evidence in green. Click words in the teacher model answer to highlight important content that is missing in red.
Pupil answer — mark evidence in green
Teacher model answer — mark missing content in red
Marking points
Expected output:
Python will load when you run the first program.
No unsaved changesIDLE-style colours · Tab inserts four spaces · after a line ending in :, Enter indents the next line automatically.
Program output
Press Run to test your program.
