Hello Scryfox I'm ThatOneMushroomGuy and I'll be the TA handling your critique today.

Arrows

Starting with your arrows you're drawing your marks with a great deal of confidence that helps solidify the feeling of fluidity that arrows posses as they move through all three dimensions of the world they exist in. You're keeping foreshorting in mind while constructing your arrows which allows you to make really good use of perspective and the depth of your page, this gives an extra layer of tridimensionality to your arrows.

You're not making use of hatching when constructing your arrows, so don't forget this step as it will help you establish how your arrows sit in 3d space, as well as help you reinforce your own spatial reasoning skills. As a finishing touch to your arrows, don't forget to also make use of extra lineweight on top of the overlaps to reinforce their depth.

You've done a good job with this exercise, what I'd like to tell you so you can keep improving is that you should get out of your comfort zone more often the next time you tackle this exercise, while your arrows are certainly well constructed and tridimensional they are too similar to one another in terms of how they move through space and their perspective. Try arrows with different kinds of twists and turns and different rates of foreshortening, keep in mind that arrows are very flexible objects and can move freely across the world in all sorts of manners, so you should push yourself and explore the different possibilities.

Leaves

The linework for your leaves is looking smooth which helps communicate their fluidity and sense of energy, it's good that you're not only trying to capture how these structures sit statically within space, but also how they move across it from moment to moment.

However you also have some unnatural bends present in your leaves. Keep in mind that even though leaves are very flexible structures, that mostly applies to their length and not their width. They're like a piece of paper, not a piece of rubber, they can fold and bend in a lot of ways, but they can't stretch or compress, and if you try to force them to they'll simply rip apart.

For your edge detail it's good to see that you're generally not trying to capture more than one piece of detail at a time, as well as keeping the line thickness between your phases of construction roughly consistent. However there are some times where you're exclusively constructing it subtractively which is a mistake, instead, make sure to always construct your edge detail carefully, and additively, on top of your construction, as cutting back into our forms can cause us to focus too much on manipulating the 2d shapes on the page, instead of how our marks represent edges in tridimensional space.

It's good to see that you've experimented with complex leaf structures such as in these leaves, but remember not to skip construction steps when approaching these more intricate structures.

This structure is looser than it could be because you skipped construction steps and went for complexity right away when trying to capture the complex shape of the leaf, which creates some inconsistencies and creates the risk of flattening or stiffening your construction, make sure to think carefully through each of your construction stages to ensure that a construction is as tight and specific as it can be.

Branches

Moving on to your branches they are coming along really well made as you're following the instructions for the exercise which allows you to create some solid but still organic looking structures.

There are some visible tails present in your branch structures, while this is a very common mistake we can attempt to mitigate it by limiting the amount of ellipses in our branches, by spacing them further apart we'll allow for a bigger length of runway between ellipses, and ensure a smoother, more seamless transition between marks.

For ellipses it's good to see that you're making an attempt to always draw through them twice, as that allows for a smoother mark. From what I can see you do seem aware of the ellipse degree shift, but currently your degrees are often a little bit too consistent and hardly change which flattens your forms. Remember that as a form shifts in relation to the viewer, so will the degree of the ellipses within that structure also shift.

Plant Construction Section

Now let's move on to your plant constructions. You're showing huge potential and a great sense of spatial reasoning in your work

The biggest issue that's noticeable right away in your plant constructions is the fact that you are not drawing through your forms, this mistake is consistently present throughout all of your pages from the first construction to the last.

This is not helpful because it doesn't allow you to engage and develop the skills Drawabox is trying to teach you - your sense of spatial reasoning. When we draw only what's visible we're relying on our observation skills rather than fully constructing the structure, but when we draw through your forms and construct them fully we're engaging our brain and forcing ourselves to look at our structure not as something to copy, but a tridimensional puzzle that we must solve using the tools we've been given beforehand, this way we can fully understand how structures exists in space and how each form relates to one another.

So draw through all of your forms, as small or as unecessary as you might believe them to be, forms don't stop existing when they become obscured by others parts of a construction.

Don't forget to make use of the construction methods as they are introduced, when tackling forking branches such as in here and here you're not establishing the knot from where your new forms will stem from, which leaves the relationship between those forms less clear and specific than it could otherwise be.

Not only should all forms in your work be fully constructed, but they must also be completely enclosed, don't leave forms open ended such as the plant pot in this construction, cap it off with an ellipse.

It's good to see that you're constructing your plant pots alongside your plant structures, but you can go further and make sure to add an inner ellipse at the top, in order to communicate the thickness of the border of the pot, instead of leaving it ambiguous.

You're not making use of edge detail in your plant construction pages, by not adding it they're left very simple and you miss out on a great tool to help you further communicate the way your structures exist and move through space. Make use of edge detail whenever possible, and remember that only the last step of leaf construction - texture - is optional.

Final Thoughts

In general you are doing really well, you're making use of the construction techniques introduced in the lesson correctly and you are developing your sense of spatial reasoning as a result, even if you're not drawing through your forms. As such I don't believe you'll benefit from revisions and I'm going to be marking this submission as complete, but don't forget to address this very important point in the next lessons. Good luck in Lesson 4.

My bad, I accidentally marked my original comment with revisions. Feel free to move on.