Science · Grades 4

Coded Signal Relay

Use patterns of short and long pulses to send information over a distance.

About 12 minutesCore levelInteractive practice
Start Coded Signal Relay

What children practice

  • Coded Signal Relay: Use patterns of short and long pulses to send information over a distance.

How to use this activity

Invite your child to try the challenge independently first. Encourage them to explain their thinking, use the immediate feedback, and try again when an answer does not work. Short, repeated practice helps build confidence.

Related Science activities