GRADE 2 · COMPUTATIONAL THINKING · ABOUT 25 MINUTES

Spot and fix an instruction bug

Compare the intended destination with the actual path.

Understand the idea

A bug is an error in instructions. Trace what happens before changing one step.

WORKED EXAMPLE

The goal is (2,1). Right, Down, Down ends at (1,2). Replace the last Down with Right.

Watch it step by step

Step 1 of 4

Start

Place a counter at (0,0).

Time per stepMotion off

Choose Play to advance steps automatically.

Read or choose any step

Start
Place a counter at (0,0).
Right
Move to (1,0).
Down
Move to (1,1).
Fix
Use Right to reach (2,1), rather than another Down.

TRY BEFORE CHECKING

Exercises with feedback

MAKE SOMETHING YOU CAN EXPLAIN

Your practical challenge

Trace the wrong and corrected paths on paper. Explain the one change.

My project notes or dictated explanation

Review your evidenceIdentify the wrong endpointChange the relevant instructionRetest from the start

These ticks are your self-review. They do not automatically assess project quality. Ask an adult or partner to review what you can show.

What did I learn, change or need help with?

Use the skill in a new situation

Create a one-step bug for a partner to find.

Your local practice space

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Each space keeps each grade separate. These spaces are not private accounts; use separate browser profiles for privacy on a shared device. About your practice data

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