Focused lighting and White chalk on Black paper

Above one of Shayni's drawings. She is the youngest member of the class and she is showing great promise

Jizzy's drawing, white on black paper and willow charcoal too. The first exercise was strictly white on black and these photos are of the second exercise, white and black on black.
The purpose of this exercise is to make people see the shape of an area of highlight on the body and also the shape of areas of shadow and to break all tones down to either white of black

Christine's

Forgotten who did this study!