From a federal regulatory/FAA perspective, at this time there is no official certification for folks looking to teach drone operations. There’s no certified flight instructor (CFI) rating for sUAS.
FAA Drone Training & Part 107 Test Prep
More than 50,000+ students trust Drone Pilot Ground School, a training program managed by UAV Coach, the largest and most reputable online-based drone training academy in the sUAS industry.