TryEngineering
Try Engineering: Electric Messages: Then and Now
Lesson investigates electronic communication from the Morse Code system to text messaging. To learn about this, students construct simple circuits, send messages to each other, and explore the history and impact of communication.
PBS
Pbs: American Experience: Rescue at Sea
Companion website to the PBS documentary on the collision of two ships in 1909 and the reliance on the newly invented telegraph for rescue.