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Having worked with many clients with diabetes over the past 20 years, the major challenges I experienced were managing the medications safely and correctly (especially those required to take insulin);
on OIB-TAC Roundtable Forum: Managing Diabetes with Vision Loss
It is true not everyone has access to "high tech" such as zoom or facetime, but most have a telephone. It's worth giving it a try.
on OIB Roundtable Forum - What's Working (or not) with Remote Training
I know one thing we have all learned is how important excellent verbal communication is in providing remote instruction.
I would probably not really recommend a knife skills training remotely. This often really requires hand-over-hand or direct observation.