My little one has a few enrichment classes but her favourite class is always her swimming class once a week at the Serangoon swimming complex. Ask her why and she said cos of the swimming coach and her friends at the pool. She started swimming at the age of 4 years old as she was having mild asthma and thought that swimming might be a good form of exercise to improve her stamina and asthmas. The group of friends in her class is usually less than 7 of them. Duration is about 45 to 60 mins depending on the class size. The more students the longer the class will be and also cheaper per lesson. The coach will actually teach them the name of each style that he teach e.g. breast stroke kick and also talk to them about the different swimming styles and surviving skills and dos and dont's of swimming. But so far she is still not able to swim confidently on her own without her swimming board in the deep pool. Hopefully she will improve over time.