Very nice work! There are a couple things I'll address but overall you're demonstrating a good overall grasp of the material in the lesson.

Starting with your arrows, they're flowing very nicely through all three dimensions of space, and doing so with a sense of fluidity and motion. Just keep in mind that the spacing between the zigzagging sections compress as we look farther back into the world - this helps convey the depth of the scene, as it is simply another application of the rules of perspective. Leaving it out will make things look a little more shallow, like the arrows are flowing across the surface of the page.

Moving onto your organic forms with contour lines, a couple things stand out:

• You're definitely striving to stick to simpler sausage forms, though there are still cases where the ends aren't quite spherical (instead somewhat stretched), where there's pinching or swelling through the midsection.

• In many cases, the degree of your contour ellipses remain pretty consistent throughout their length. Instead, they should be shifting gradually along the length of the sausage form, getting wider/narrower as their position changes. As their position changes, their orientation relative to the viewer changes as well, as shown here. This applies to your contour curves as well, as these are of course just the visible portions of larger ellipses.

For your texture analyses, I think you did a very good job. The results themselves aren't stellar in appearance or anything like that, but what's important is that they're demonstrating a clear effort to shift your focus to thinking in terms of shadow shapes, rather than outlines. Furthermore, moving onto the dissections, you employed this understanding to do an excellent job here. You continued leveraging those cast shadows and shadow shapes and wrapped them nicely around the rounded forms, demonstrating control over textural density and all around doing quite well.

Your form intersections are very well done, and demonstrate a really good grasp of how to construct forms in the same space that feel consistent and cohesive. You're also moving in the right direction with your intersections, which shows that your understanding of the spatial relationships between the forms is coming along well. This is a concept that we're merely introducing here, and your grasp of it will continue to be developed throughout the entirety of this course.

Lastly, your organic intersections are coming along, though there are some points of weakness. Above all, this exercise is all about understanding how the forms you draw are solid, three dimensional, and have their own weight. Therefore cases like where on your first page, the top-most sausage form appears to be rigid enough to leave a gap beneath it as it bridges across two underlying forms undermines the believability of the illusion you're trying to create. In general, you need to consider how each form interacts in a believable manner with its neighbours. The way you've laid your forms out here - lain across one another, in parallel - doesn't really give an impression of stability or equilibrium. Like the second after this snapshot was taken, the pile fell apart. Place them in a way that is more likely to remain stable - go with perpendicular arrangement rather than parallel, for example.

Additionally, watch cases like this sausage where you've just pasted it right on top of the drawing, not considering how it integrates with the stack and which side is visible when drawing the cast shadows.

Anyway! All in all, you're doing a pretty solid job, so I'll go ahead and mark this lesson as complete. Keep up the good work, but be sure to keep an eye on your organic forms and organic intersections.