Arrows:

-Good job on these, they flow nicely and the hatching is well executed.

Organic Forms:

-Vary the openess of your contour lines more.

Texture:

-Excellent job on these, you've done a successful job at conveying the shadow shapes and the gradient transition.

-Good on the dissections too, but there could be more of a gradient transition and the silhouette looks a bit too dark.

Form Intersections:

-I would advise against running your hatching parallel to your plane, just looks rather confusing

-Consider how the surface of one object will interact with the other. At times you ended up flattening forms like the cones on the third page.

Organic Intersections:

-At times the shadow shape doesn't follow the shape it is being cast on. On the first page look at the leftmost form.

Good job, you've demostrated your understanding of the concepts. Feel free to move on to the next lesson.

-Slyx