Starting with your arrows, you've done a great job of capturing how these flow fluidly through space in a convincing and believable manner. You're doing a decent job of compressing the gaps between the zigzagging sections as we look farther back in space as well, so perspective is being applied pretty nicely, though I think this compression of space can be exaggerated even further to get a stronger sense of depth.

Moving onto your organic forms with contour lines, you've clearly been mindful of sticking to the characteristics of simple sausages as explained in the instructions. You're also largely doing a pretty good job of drawing your contour ellipses confidently (they're a touch stiff in a couple places but mostly well drawn, and so they maintain a pretty even shape). They're also pretty accurate in that they fit snugly between the edges of the forms. You're having more trouble in drawing the contour curves however - they wrap around the sausage form believably, but they're considerably more stiff and show difficulty in fitting where they need to. One thing you may be doing is drawing more from your wrist rather than from your shoulder - a more limited radius might contribute to ending up having to mix up your arm pivots and lose consistency in the motion. This can throw off your accuracy and the flow of the stroke.

Towards the bottom of the page, you do get better at this, but it's definitely something you'll want to focus on.

Moving onto your texture analyses and your dissections, these are looking very well done. You're clearly focusing a great deal on employing shadow shapes instead of outlining your textural forms, and this allows you to achieve good transitions from dark to light and dense to sparse. This carries over into the dissections nicely where you continue to respect the importance of leaving outlines aside and focusing only on shadow shapes - this is something students often forget when tackling a wider variety of textures, so I'm glad to see that you're still working in the density shifting.

Your form intersections are largely looking well done, though I think one thing that would help make the boxes in particular feel more cohesive and consistent with one another is to avoid more dramatic foreshortening. Pushing those vanishing points farther away and reducing the rate at which they converge will help keep the sense of scale over the whole set of forms more consistent. Also, don't forget to construct your cylinders around a central minor axis line as shown here (in the diagram for that step).

As far as the intersections are going, you've got a lot of solid swings, and some solid results. This exercise focuses on exposing students and introducing them to the concept of defining the spatial relationships between their forms. I don't expect perfection or even success - I'm just interested in providing an exposure to the challenge at this point, as it is something we'll continue to explore throughout the course. That said, you are showing a good start, and I'm pleased with your results.

Lastly, your organic intersections certainly do a good job of establishing how these forms interact with one another in 3D space. Your first page doesn't quite give a sense of gravity however, due to how the forms appear to be floating more loosely above one another. The second page is a little better in this regard, though there's still a sense of weightlessness due to the physical gaps between the forms. When doing this exercise in the future, strive to think about how the forms would press down upon one another, how they'd slump and sag under the forces of gravity to really sell the impression that everything is solid and real.

So! Overall, you've got a few things to keep an eye on (mostly those contour curves), but I'm pleased with your progress. I'll go ahead and mark this lesson as complete.