Input–Output Machine

Build an ordered program, supply an input, follow each transformation, and observe the screen or meter output.

Grade 3 · CMP-0012 · no voice

1. Input

Instruction bank

2. Ordered program

Add instructions in the order the machine should execute them.
⌂ Orco Academy
🌱 Primary · Grades 3–5 · Computing

How “Input–Output Machine” works

🎓 You are learning to: Build an ordered program, supply an input, follow each transformation, and observe the screen or meter output.

Welcome! Three steps and you are learning:

  1. 📖 Read the challenge

    It tells you what to build, sort or fix.

  2. 🧪 Experiment

    Try things and watch carefully what happens. You can always reset.

  3. 🔧 Fix and improve

    Use the feedback like a detective: what clue tells you what to change?

💡 Top tip: if you get it wrong, that is useful — find out why before trying again.

Nothing you do here is saved or sent anywhere — experiment freely. Reopen this guide any time with the ? Help button.