I have a great resource I have to share. I believe my elementary principal shared this with me last year through a website he saw or something. (**He is really good about sharing things he finds on blogs and twitter, etc.) The books/resources are entitled Anyone Can Draw by Stephan Baker.
Here is the link to the main page of the website where you can watch a video and purchase the materials: http://anyonecandraw.ca/products/
The books are like most how-to books, but break down most items into squares, circles, triangles, and lines. There are a variety of subjects within the book, but a few of my personal favorites are the castle/prince/knight/dragon section and the pirate ship/under the sea section.
I use this in my classroom by doing a follow the leader drawing when I need to fill in some time or for my early finishers. I love it because most students feel confident in drawing simple shapes and this book takes it one step further by putting these shapes together. I believe that it is a great beginning step for young drawers and those who just "see things differently".
I purchased this books in the middle of last year and every time I have used them, I have seen success from all of my students, even those who lack confidence in their drawing skills. I purchased both the primary and intermediate books and although both are somewhat similar, the intermediate book starts throwing in dimensions/perspective.
A few weeks ago one of my 1st grade classes missed art, so to keep both of them in the same place with projects I used this as a filler for the class who was ahead. I usually draw for the majority of the time left and then allow a little bit of time to color with colored pencils. I like the drawings without color, but the students love to color them. Plus, I rarely use colored pencils with my 1st graders so this was an added bonus :)
I was pretty pleased with the results. Below are pictures from some of my 1st graders: