Done as part of a class.
My current goal is: Improve my rendering of faces
In these drawings, I can not tell what you have done on the faces. They look like a good start but you did not finish what you started. Go on the internet to find information on drawing heads & faces (measurement in various views). In general, from the hairline to the eyebrow is 1/3; from the eyebrow to the bottom of the nose is also 1/3; from the bottom of the nose to the chin is the final 1/3. Research your subject.
Do you have access to the heads class?
That would be a better place to focus.
Everyone does! The faces & expressions tool is free to the world. :)