Teaching LinkedIn Zip #478: students sketch one checkpoint hop at a time on this 6×6 board. 10 checkpoints, 0 walls. Walk the 9 segments before drawing the full line.
Board spotlight: Checkpoints sit close together on the grid — short numbered hops still need full-cell coverage between them without revisiting squares. Wall count 0 on 6×6 shapes which corridors stay open between numbered cells.
Lesson hop 1: show why the path must pass through R6C6 before checkpoint 2. 4 cells link checkpoint 1 at R6C3 to checkpoint 2 at R6C6 with open corridors (no walls on this segment).
Lesson hop 2: show why the path must pass through R3C6 before checkpoint 3. 4 cells link checkpoint 2 at R6C6 to checkpoint 3 at R3C6 with open corridors (no walls on this segment).
Lesson hop 3: show why the path must pass through R1C4 before checkpoint 4. 5 cells link checkpoint 3 at R3C6 to checkpoint 4 at R1C4 with open corridors (no walls on this segment).
Lesson hop 4: show why the path must pass through R1C1 before checkpoint 5. 4 cells link checkpoint 4 at R1C4 to checkpoint 5 at R1C1 with open corridors (no walls on this segment).
Lesson hop 5: show why the path must pass through R4C1 before checkpoint 6. 4 cells link checkpoint 5 at R1C1 to checkpoint 6 at R4C1 with open corridors (no walls on this segment).
Lesson hop 6: show why the path must pass through R5C5 before checkpoint 7. 8 cells link checkpoint 6 at R4C1 to checkpoint 7 at R5C5 with open corridors (no walls on this segment).
Lesson hop 7: show why the path must pass through R2C2 before checkpoint 8. 7 cells link checkpoint 7 at R5C5 to checkpoint 8 at R2C2 with open corridors (no walls on this segment).
Lesson hop 8: show why the path must pass through R4C4 before checkpoint 9. 5 cells link checkpoint 8 at R2C2 to checkpoint 9 at R4C4 with open corridors (no walls on this segment).
Lesson hop 9: show why the path must pass through R3C3 before checkpoint 10. Tight 3-cell hop — checkpoints 9 and 10 sit near each other; still visit every intervening cell exactly once.
Recap: 10 checkpoints, 9 teachable hops, one continuous route. Replay using checkpoint-first planning.