To start, your arrows are generally looking pretty good, though as we look farther and farther back, be sure to keep emphasizing and exaggerating the foreshortening, especially as it applies to the gaps between your zigzagging sections. Moving onto your leaves, these are definitely moving in the right direction, and you're capturing a nice sense of flow and movement to them, although I do feel that a little more time can be invested in your individual marks. Remember that the lines you're drawing on their surfaces are contour lines, not representations of the actual veins, since we'd instead be capturing those using cast shadow shapes as discussed back in lesson 2's texture section. I'm pleased with how you approached the little bit of extra edge detail you added on one of your leaves, but as a whole you definitely focused on this exercise at its simplest level, rather than pushing it as far as it could have gone.

One last point on that front - try drawing these a little bigger in the future. Giving yourself more room to construct your forms will help you engage your brain's spatial reasoning skills, as well as your whole arm when drawing. Drawing things smaller tends to cut those off, resulting in a more cramped, and stiffer result.

Your branches are largely moving in the right direction, although these could also be drawn a fair bit larger to really lean harder into what the exercise is developing in your skillset. You've got varying results when it comes to getting those segments to flow seamlessly with one another, but those visible "tails" are actually pretty normal. Just try to make a point of extending them fully halfway towards the next ellipse - you have a lot that extend only a little ways, resulting in far less room to overlap with the next segment. Having a "runway" before shooting off towards your next target helps a great deal, as shown here.

Moving onto your plant constructions, again - the size thing really becomes noticeable. You're really not taking advantage of all the space available to you on the page, often leaving gaps equal to the amount of space actually used for your drawings. It's not that you should fit additional drawings in there, but rather that working through all of the spatial calculations your brain has to do in order to construct each individual form in its rightful place really requires a lot more room. Often students will draw smaller specifically because they're not confident in their ability to do so, and they end up self-sabotaging to an extent.

Another major problem I'm noticing is the tendency to treat these drawings as though the intent is to create something pretty and clean at the end. This results in you skipping a lot of steps, or making choices to leave certain lines out in favour of avoiding clutter. Every single drawing you do within this course is, itself, an exercise. The point is about how it trains your brain to think about working in 3D space through every mark you draw, every form your construct, and how you fit them all together.

One critical element to this is drawing through your forms. That means drawing each and every form in its entirety, regardless of whether another form sits in front of it. Even if something else is blocking the viewer's vision of something, it still exists there in the world, and therefore should be drawn in its entirety so we can fully understand how it sits in the world, and how it relates to the forms around it. So, cases like the drawing on the right siude of this page where you only drew the portions of the petals that were visible is incorrect, even though those petals were otherwise drawn reasonably well. Looking at the drawing on the left side of this page, it largely ends up flattening down into 2D shapes, and any sense of depth or a third dimension in the scene is lost.

As you continue progressing through the set, there definitely is improvement. Drawings 9-14, though still very small, start to come together much better as a combination of a series of solid 3D forms. The top of 12 still only has the "visible" portion of those leaves, but I do quite like how you've drawn through the flower pot, the trunk, etc. 14 however is showing the value of drawing through your petals, and you're able to wrap your head around how all of them sit there in the world.

All in all, I think that you're making a lot of mistakes in terms of how you're approaching the material, but despite that are still showing that your understanding of 3D space is improving. I do however want to ensure that these mistakes are resolved before we move on, so I'm going to assign a few additional pages.