The great architect Louis Sullivan wrote:
Whether it be the sweeping eagle in his flight, or the open apple-blossom, the toiling work-horse, the blithe swan, the branching oak, the winding stream at its base, the drifting clouds, over all the coursing sun, form ever follows function, and this is the law.
Minimalists soon reduced this to form follows function, but it's still the law. LYCS Architecture, one of China's most interesting firms, applied it to the design of the Tian Tai No.2 Primary School on a tight site. The entire form of the school is determined by the shape of the track and the basketball court. This is very efficient in terms of the use of land, makes terrific use of the roof.
And makes a pretty spectacular courtyard in the middle. Essentially, the entire footprint of the site is useable, which on tight urban sites, is something to strive for. Lots more photos in designboom.
It's fascinating that a firm that is so devoted to the idea of form following function can also design this: