In the two weeks between watercolor classes, I did some exercises from a book I picked up at the library "Watercolor for the First Time' by Kory Fluckiger. The book was a little more basic than I really needed but made for good practice.
When I do these exercises, I always try to change things compositionally, often changing some elements, such as colors or objects in the painting. This lesson was about painting seashells, but I looked some pictures from the morguefile, and chose different shells, and placed them in different parts of the composition.
I did this painting in 5.5 x 8.5 Gamma Stillman & Birn. The Gamma paper is a little smooth, more like a hot-press, but still accepts light washes. I worked it to it's limit, but it held up well.