Hi tigwig, my kids went to swimming lessons since they were about 3 or 4 and it does take a while for them to have the strength to pull themselves confidently through the water, it is better from them to take the time to learn the strokes properly rather than rush them through the levels, however frustrating that is for you. You will always get the parents who boast about what level their child is on, but there is a lot of evidence that the teachers dont necessarily mark them at the same competence. the teachers that my boys have now are a lot stricter than others I have seen and I am happy with that. They have finished the main levels now (scotland, different system) and they are now developing their strength and endurance, but that is them 11 and nearly 10. If you are concerned that the teacher is not doing her any good, then by all means speak up, but it does not happen overnight.