[JackCh]

Yes this is in the US. The school district owned one pool. A few years of your 12 years in the school district system, students would get a week or two of lessons during gym class (being bused to the pool from the other schools in the district, when necessary.) About an hour of lessons 2-3 times a week for one or two weeks, a handful of times in twelve years. On second thought 20 hours may have been an underestimate, but not by much.

That same pool is also where private swimming lessons for all ages were available for a modest fee (that program was subsidized by the pool's existence but otherwise self-funding. I worked as an instructor in that program for a few years and got a modest paycheck for it.) That pool was also use for practice and meets for the swim club (competitive swimming for young children) and the swim team (competitive swimming for teenagers.) Private lessons were mostly attended by young children, their parents stopped paying for it once they were reasonably confident their child wouldn't drown and it was very rare for anybody as old as a teenager to take those lessons. The pool was also open to the public once or twice a week for a dollar or two and there was a lane set aside for lap swimming, but it was rarely used.

I'm not sure what the bottleneck was that prevented more school-hour swimming lessons during their scheduled gym classes. It may have been the busing requirement, since there were a handful of elementary schools in the district that were not close to the school building that had the pool.