Sorry, I should have pointed you to the second blog post. But I'm glad you got something out of the first one.Thank you for that link. Maybe that's the same info that is in the link about teaching neutrally buoyant in your signature, which I have seen many times and never taken the time to click on? I especially appreciated the graphic illustrating the difference between the centre of mass and the centre of volume - that's a concept I had never really thought through before.
I found the subsequent post with the details of the mask and snorkel exercises and think they are great! Stand in chest deep water with just a snorkel and lower yourself down until your eyes are above water and your nose is submerged and just breathe through the snorkel - that's brilliant! So simple, and so easy to recover from if it doesn't go well at first... I think that exercise alone would do a lot for my wife's confidence with a snorkel. And truth be told I probably would fail that exercise myself the first couple of times I tried it - I'm thinking I try to breathe through my nose a lot more than I realize when I'm diving.
So here's an offer. Come to the Greek island of Chios the first two weeks of August. I'll be there with my family for my nephew's baptism. We'll be staying at the Golden Sand Hotel in Karfas, right on the beach. I'd be happy to teach your wife right off beach. I may also teach my cousins and their wives. Chios is a less touristic island, so the Greek experience is more authentic. Plus having family there by marriage (my cousin's wife), you and your wife would have a unique experience, guaranteed. Look up Pyrgi, Mesta, and if you go, you'll become as addicted to masticha producs (especially the liquor) as me. My friend Manos who runs a shop in Pyrgi will give you great prices.