Here you have a template of this new activity for Unit 08.
You can find the examples to copy in this link
The assesement criteria are:
1st.- Name, last name and group.
2nd.- Draw a frame.
3rd.- Get a wide range of value/tones from black to white.
4th.- Get homogeneus values on the “tone scale” and on the different faces of the cube.
5th.- Get soft transitions in value/tone on the sphere.
7th.- Self Assessment
And further information about how to shade with pencil in this other link