Usually we work basically with the breast stroke technique. Breaststroke officially is the first stroke to learn in Sweden according to Swedish Swimming Association. However, technically it is the most complicated one. Breaststroke is quite inefficient stroke but very relaxed one. That is why it used to be taught first, because in case of emergency or incident in water a person would able to save more energy, stay alive longer. So that is why we are teaching it first.
Here you have expert tips from Olympian Steve Parry (from UK) on how to perfect your freestyle technique.