Anybody know anything about sharpening things?
Srsly?
I can sharpen things to within an inch of their lives.
I can also do a varied host of other things more than reasonably well - my career path has been errr.... chequered.
What I'm not sure I can do is to teach those things to others.
That's a skill in itself.
How well you can teach can be dependent on how well the class can learn. At a basic level, if you can do something well, and talk through what you're doing and why you're doing it, at the same time, you can teach, if your pupils are the sort of people who can take that on board quickly. With many skills, people either 'get it' quickly, or they don't - if the latter, then they may just need more showing, or they may need someone to explain it in a different way, or they may just never get it!
I've taught a couple of people to knit, and totally failed to teach one person to knit, even though he claimed to have done it before and just need reminding - but he simply couldn't get the wool round the needles, no matter how many times I showed him. Presumably, there was a teaching technique that would have worked for him, I just couldn't find it!
So, I guess I could show and tell knitting, and some rather specific things like making flower and butterfly ornaments out of old coke cans, and other recycling/upcycling. More like craft workshops for fun than learning a useful skill.
I have been drafted in at work to lead some craft sessions for over-55's, so I'll let you know how well I do at teaching them!
My academic speciality, the analysis of archaeological animal bone assemblages, would require a rather specialist reference collection!