The Radio Merit Badge is an excellent offering for Scouts during Jamboree on the Air or any other time that you can arrange for instructional space and the time of both instructors and Scouts. The merit badge requirements were updated in 2017 and you can find an FAQ at https://www.k2bsa.net/radio-merit-badge-2/
Slide decks are also referenced on that page set up to teach the course in three one-hour blocks or, as at the 2017 Jamboree in two 1.5 hour blocks with about 30 minutes for on-the-air time to fulfill that requirement.