Our project was to create 3 views of a shoe using pure contour. This project was difficult because you had to pick out the most important lines and you couldn't use shading. I especially had trouble with the frontal view because it was hard to get the proportions right.
The second part of the project was to zoom and crop the most interesting part of your shoe three times. I found this difficult because you had to use a view finder to create the zoomed in section of your shoe, and the view finder isn't that big so you had to scale the drawing up by a lot.