Goldfish and Kids First both do private lessons.

ISR is awesome (look up Kaley Hoffman) but it's EVERY DAY for a few weeks so you need to find some place convenient to you. But it works. My kid slipped in the pool right next to me and instead of immediately running after her, I watched to see what she did and she did a starfish on her back. This was over a year after she completed the program with Kaley. It's been a few years and she still talks about swimming with Kaley.

I am also interested (bethesda/ silver spring) for a 2 year old who has done ISR. It seems like there is not much before they turn 3/4 for next steps.

Look up we aquatics. They have multiple locations and lessons are 1:1.

Does anyone know of 1:1 indoor swim lessons that are indoors and in NW, Bethesda, Arlington?