In my experience, most people learn much better from being shown concrete examples inside the workspace they already use compared to abstract examples on a whiteboard with lots of lines and arrows.
Also, when viewing/listening remotely, I will record the session -- especially if they're assigning a complex task or series of tasks. This allows me to playback and get things exactly right.
In person, I would have to smuggle in a recorder and it's often awkward or infeasible.
In my experience, most people learn much better from being shown concrete examples inside the workspace they already use compared to abstract examples on a whiteboard with lots of lines and arrows.