The sequence of our skill development is guided by these principles of physics and physiology:
Balance (and Stability)
Synchronized Whole-Body Propulsion
In TI this is called the BSP Pyramid.
We both build the skills and diagnose/correct problems in this order of priority. Their position and size symbolize their relative importance in your swimming ease and speed.
If you establish balance first, it becomes much easier to create a streamline body upon it. If you improve streamline, it requires less propulsive effort to travel forward faster. This translates into easier, faster, farther, and more enjoyable swimming.
BSP Principle Skills
We break the three principles down into skill sets:
Fore-aft Balance (Superman Glide)
Rotational Balance (Superman + Recovery)
Passive Streamline (Skate Position)
Active Streamline (Spear Skate/Switch, Swing Skate/Switch)