Have students work through the Steps 1 through 5 of the "Data Wires" lesson in EV3 Trainer from Carnegie Mellon University's Robotics Academy.
The EV3 Trainer has a video describing Data Wires:
Bonus > Data Wires > 1-5
Material Type:
Tutorial
Education Level:
Middle School [1]
High School [2]
Focus Subject:
HW Platform:
EV3 [5]
SW Platform:
EV3-G [6]
Interactivity Style:
Mixed [7]