Teaching article

A model route must respect the obstacle, not just reach the goal

Plan a path that respects a stated spatial constraint.

Mark the blocked area before planning a cardboard path. A route can arrive at the destination and still fail the brief by crossing the protected space, making constraints worth checking separately from the endpoint.

Mark start and destination. Identify blocked areas. Test a proposed route.

Trace every part of the proposed route

The route must go around the model garden rather than through it.

Keep the obstacle boundaries fixed during testing. A route satisfying one constraint can still fail another stated requirement.

Shortest is not always the only criterion. Did the route respect every boundary?

Trace with a pointer.

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