Have any of you heard of Infant Swimming Resource? (Website) They were featured on the news here last summer, and my mom just sent me an email today of some family friends out in Arizona who just completed the program. Apparently, this program teaches infants as young as 6 months how to survive in water--teaching them how to roll to their back and float...even fully clothed.
The classes meet frequently (10 min a day, 5 days a week, for 4-6 weeks) and most parents rave about it. Critics say that it gives parents a false sense of security. (I realize that nothing...not even swimming lessons...are a substitute for parental supervision around water.)
Do any of you have experience with this type of class?  Would you recommend it?
Re: s/o swimming lessons
We have already started swimming lessons, but it's more just for fun swimming. We do practice back and belly floats and putting their heads under water but most of the class is singing songs and having fun. We go twice a week and Emily loves it. I think once you move up in levels it becomes more educational but we don't get to move up until 12 months
I've never heard of this type of swimming lesson.
IMO it's a crock.
I will put the full disclaimer that I've been teaching Red Cross and YMCA swim lessons for 13 years now.
ISR capitalizes on an infant's natural ability to fight for survival. I've "taught" an 8mo old to float... but I use "taught" loosely because it's part of their natural ability at that age. Most infants will naturally do this, up until they have a sense of fear of safety.
But on the flip side, I think infant swim lessons in general are a waste of money. I've taught several parent/child classes and most of them don't go much beyond playing games, singing songs, and doing a little bit of floating, bubble blowing and jumping. The only time when it's not a waste of money is when a parent is not comfortable with the child in the water, meaning they have no idea what to do. There are good things to come out (like you shouldn't submerge a child under the age of 3 more than 3 times in 30 minutes, how to safely enter the pool with the infant/toddler when you are alone, etc.) but a lot of these things are easily discovered with a little bit of internet searching or asking questions.
So... take my opinion for what it's worth. It's extremely important (to me) to get the child introduced to the water at a young age. DS has been in the pool several times since he was 6wks old.
The best thing to do in general is preventative. Don't let them around the pool without a parent. If you're going to be at a house with a backyard pool, make sure it's fenced and secured. Life jackets are great, but don't let your toddler become 100% dependent on them, take them in the pool w/o the life jacket so they understand it's necessary to have but they can learn (while supervised) without.
I will say too that now that I teach all private lessons vs. group, I will not take a child before they're potty trained. On a very, very rare occasion, I've had a child that understands their body and how it moves before they're potty trained, but usually those things go hand in hand. I have had a couple 3 year olds swimming before, but their parents were super pro-active about getting them in early and regularly.