I'm starting to write a blog which is talking about "design",
and it contents some sketch lessons as well,I hope it can give you a little help!
but the only problem is ~it's a Chinese blog!!!(due to my poor English)
I guess there are some of you can read Chinese because there are always some Asia students all over the world.
or maybe you can try "idiot auto translate" in right side of blog.
unlike other step by step tutorials,the lessons will focus on "how &why",
I try to explain the basic theory and concept in sketch and tell you how it works,
instead of just show you the process and final result but didn't explain anything.
feel free and drop me your response or question!