Learning event which is led by an instructor, and can be held in a physical location or delivered via a network. Usually implies training at the professional or corporate level, and synchronous learning.
Instruction in a conventional or virtual classroom under the direction of an instructor or facilitator.
training, either classroom or online, that is guided by an instructor and occurs in "real-time". Most online instructor-led training has at least some elements that are highly interactive between the trainees and the instructor.