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Expanding Square Search
Lesson 3

Expanding Square Search

What Students Learn

Students learn how drones are used in search‑and‑rescue operations to locate individuals when only an approximate location is available. They discuss how expanding square patterns work, why they are effective in these scenarios, and how the Engineering Design Process guides responders in planning aerial searches. Through a real case study, they see how drones equipped with cameras and thermal imaging help locate missing individuals quickly and safely.


What Students Do

Students code Hopper to fly an expanding square search pattern beginning with 5‑foot sides and increasing outward in 5‑foot increments. Using the taped grid as a guide, they calculate distances, plan each leg of the pattern, and refine their code to keep Hopper within the 20' × 20' search area. After testing and adjusting their program, students can extend the activity by using Hopper’s camera to locate a hidden landing pad representing the missing individual.

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