Here are my sketchbook pages from this class: I've started with exploring colors and a loose landscape painting. On the right are leaves and berries in ink with a watercolor wash on top.

 

Showing some principles on how to draw leaves and tree shapes:

 

Sketching a toadstool - for the white bits I added gouache on top. On the right a sketch of a chestnut. I make notes about the things I find interesting or that I want to remember.

 

A sketch of a cormorant: