It is so wonderful to see this post, watching you draw makes me want to draw a tree too. Your tree is very handsome and the technique you used to draw it is impressive, done with great efficiency and produces excellent result.
                   
I feel that I have learnt and gained useful knowledge just by watching you draw. You are a great, kind, and inspirational teacher :).    
                     
Shibasaki-sensei ha sugoi desu ^_^!