It all depends on the progress of each child but we do not set target for your child. Please be relax in terms of level because we believe, each child has his own timing. We do not compare one's progress to another. We believe each child is unique and has his own time to progress. Some will have a good balance first, some will submerge first thus it does not mean one child is smarter than the others. Because someday, the good balance child will also submerge and the one who submerge will attain balance. That's why we believe learning is a continuous process, including learning to swim. What you can try are increasing the intensity of learning by practicing at home and (if possible) have an additional session by yourself, it might help your child to progress in some ways.