Pre-made lesson plans and other interesting info on the New Caledonia Site: https://www.caledonianordic.com/programs/youth-programs/SDP-coach-resources
Great breakdown of skills for each level, on this site, as well as some fun activity suggestions: https://www.kanatanordic.ca/coaches-corner/
One coach should carry a radio for each class.
Select Channel #1 and turn on Power/turn up the volume.
A diagram of the radio and its controls are available (click here).