What happens from the eyes through the brain to the hands? Drawing lessons are supposed make the budding artist become aware of how to translate the 3-D images that the eyes see into a draw-able 2-D image to fit somewhat proportionally onto the drawing surface. There are a couple of teachable methods that artists have used for centuries. One is the grid method and another is called sighting. Let's not forget that most of the time, there is no method; people just draw.
The shoe drawing is a "theme" drawing <- read more at the link.
Drawing 1A and Drawing with Children
Printable lessons that I made for my children and you may print them from my website. Purpose of lessons: To learn to see as an artist sees and apply that skill to drawing. To be more specific, to recognize the size, shape, position/direction of lines, dots, circles, etc. in a defined space.
Drawing with Children Lesson One [in Art > Books]
Once drawing is going fairly well, a student studies other aspects of drawing such as texture and shading, for instance, as well as perspective and the principles of composition.
Without further rambling, I have a few drawing resources and ideas. Browse the bottom row of links in the menu bar above to see drawing resources.