Your work here is very well done! You're largely demonstrating a confident grasp of the material covered in the lesson. I'm going to go through exercise by exercise and see if I can find anything that may be off, but by and large you've done a great job.

Starting with your arrows, these flow very nicely through space, both with extremely confident linework and an excellent sense of depth. You're doing a great job of capturing the effects of perspective, both on the positive space (the ribbon of the arrow getting narrower) and the negative space (the distances between the zigzagging sections of ribbon compressing), as we look farther back.

This confidence and fluidity carries over nicely into your leaves. Many students get very caught up in the idea of these leaves being the first concrete thing they've been asked to draw as part of these lessons, and as such they focus heavily on capturing just how each leaf sits statically in space. They capture a single moment that goes on for an eternity. Conversely, your drawing captures the sense of motion, of how the leaves move through the space they occupy, and give suggestions as to where they might be in the next moment, or where they might have been in the last one.

You're also using construction very effectively here, building upon the structure from the previous phase and never adding detail or complexity that cannot be supported by the structure that precedes it.

The main focus of the branches exercise is to construct a longer, flowing line with a series of smaller segments, giving the impression that they all flow together seamlessly as a single stroke. You've largely achieved this quite well - there are a couple tails that are left visible but this is far less than the average student at this stage. The vast majority of yours do flow quite seamlessly and suggest a solid, gestural branch that maintains its solidity by sticking to a single consistent width. Very well done.

Moving onto your plant drawings, you've realy knocked these out of the park. Each one feels solid and well constructed, with an excellent grasp of space and form. There are only a couple issues that jump out at me immediately - and in fact, they're essentially the same issue.

I'm very pleased with how you've approached the flower pot in this drawing, being mindful of all the concentric ellipses and giving proper thickness to the rim of the pot. That said, the top ellipses sit at a degree that is not consistent with the rest of the construction. I believe these should have been wider to better match the base of the object. It's true that as the circles get closer to the viewer, the ellipses that represent them do get narrower, but in this case i think the jump was too great relative to the short distance of the change.

Jumping down to this cactus, I think that the drawing largely suggests that the cactus is a fair distance away from us. This means that the cross-sectional slices of the cactus' body would mostly be oriented away from us, facing up/down rather than being more inclined towards us. This means that where you've got a lot of wide-degree ellipses, we'd probably be more likely to see much narrower ellipses, especially on the main trunk (which is more likely to be oriented more vertically). We'll still get a bit of degree shift, but again since it's a fair distance away from us (and not enormous), that shift will be fairly minimal.

Other than that, you're doing an excellent job. You've demonstrated an exceptional grasp of form and space, as well as considerable fastidiousness when it comes to following the instructions to the letter. Keep up the great work and consider this lesson complete.