You did well, Tony. Perhaps a little too much reflected light around the eyes and the bottom of the belly could do with some soft ambient occlusion. I would also lighten the halftones on his back a bit!

Nice work, Jeff. To push this drawing even further, you could do a bit more island hunting in the lights, tone down the reflected light a notch, and soften the ambient occlusion.

There's lots of good things happening in your drawing. There is perhaps a bit too much reflected light around the eyes, and the core shadow feels somewhat disconnected from the rest of the values. Try making the core shadow lighter or soften it with a bit more transition.

You did a great job, Yvann. I would add a bit more transition between the dark halftones and the centre light - it would make your creature's head look more rounded/spherical.

Nice, Brayden. The reflected light between the legs is perhaps a little light. Try making the entire form shadow a little darker. This would give you an extra bit of value range in the shadows, allowing you to differentiate between core shadow and reflected light while still keeping the shadow values in the same value family.

Good effort, Laura. You might be surprised at how much difference some island hunting in your halftones and an extra layer of pencil over the entire shadow family would improve your drawing. Try to keep your cast shadow a single, flat value, apart from where it goes darker (ambient occlusion) as it nears the egg. You have correctly shown how the edge of the cast shadow (penumbra) can vary in edge softness, but at the moment it also appears to incorrectly form a dark ring around the cast shadow.

Nice work, Henri. In the final image, I would say that we are seeing a halftone on the side of the finger.

The first image has two light sources, making it tricky to decide if the side of the hand on the floor is receiving direct light or not. Considering the shadow shape on the pinky, my guess is that the side of the hand is receiving direct light. The light source in the third image is very diffuse. It may even be a photographic light box. You can see this by the lack of a clear cast shadow. Again this makes separating light from shadow more tricky. You did a good job nevertheless!

I hope you signed a model consent form. :) You perhaps made things a little hard for yourself by using a setup with such a diffuse light source and a lot of ambient/reflected light. It makes it quite hard to clearly distinguish shadow from light. For example: consider the direction of light needed to throw light past your chin onto your Addams apple (A). Now look at the bottom of the cheek (B) and consider whether the same direction of light might reach this area. Is (A) even receiving direct light?

Good work, Gasy. On the bust, there's a couple of places where I see halftones instead of shadows.