In this case, identifying simple volumes...

...before drawing architecture (this is a crossroads in Poblenou 100 meters far from my house).

Here we went again to see a rehearsal of the Castellers de Sants for drawing people.

For the next drawings we went to the Parc de la Ciutadella and the idea was to draw without lines, just color stains were allowed.

Drawings from other people at the course can be seen on this flickr group.