Sorry for the low quality, but you'll still want to zoom in for a better look.
I took Landscape Painting with Leighton Hickman last term (ten weeks). It was my first time in oils, and we went from 5-value, to full-value, to limited palette, to full palette. I feel I've honed my observational color sense a lot. Some are master and photo copies, but many of these were done on-site. I've learned a lot about composition and the amazing California landscape. Just goes show how much improvement one can go through in a short period of time!