Alright, I'm a little rusty on full lesson critiques; haven't done one in a while, sorry for the rust.

Lines

Great work. Overall I see good confidence in your lines, in favour over accuracy. This is good; it is as requested by the lesson.

On your superimposed lines, although good, I'd suggest varying the types of lines in the exercise. Think of spirals, curves and the like. In fact, try to make long curves and/or waves and/or spirals. This lends to very useful practice especially in future lessons where line weight will be applied on non straight surfaces such as spheres or curves.

On your ghosted lines and planes, there's a little bit of curving/arcing. This is natural, though worth pointing out. Good on you for placing your planning points where necessary; its a very useful tool that you can use.

Ellipses

Again, good work. The adherence to confidence over accuracy is done well here too.

In general, for both Ellipses in planes and the table of ellipses, there are issues where the ellipse doesn't fit snugly within the boundaries of the borders. This is related to accuracy, but its not the main focus. As before, its still worth mentioning.

For your funnels, there are occasions where your ellipses are mis-aligned to the minor axis. Learning to deal with this is important as it is a relevant skill to have in all lessons in the future (and especially in Lesson 7, as I'm quickly learning)

Boxes

One thing I am very pleased to see here is that you're not redoing any of your lines. Good job on keeping true to your lines even if they come out wobbly/inaccurate/messy. An important thing that I've observed doing critiques on this lesson is that in these sets of exercises, confidence tends to falter, due to, I find, that the objects drawn are more solid. This typically results in wobble because of an increased adherence to accuracy, and you seem to fall for this trap too. Worry not, this is completely natural.

On your rough perspective, it helps to remember that no matter what, the front and back faces are always either parallel or perpendicular to the horizon line. As such, it helps to place planning points which meet these criteria, but not drawing the lines. You can ghost the lines, but you don't have to commit. In fact, place as many planning points as necessary, there's no limit to these. Doing this is very useful for making your boxes in 250 boxes.

Your rotated boxes came along really well! Its still good for you to add line weight (a single ghosted additional stroke) to the top faces to better show which face is on top.

Your Organic perspective also came along quite well! Of course, box construction's a bit wonky, but you'll have a good amount of boxes to practice soon. Again, line weight can be used here to better clarify which boxes are on top. Apply them on the silhouette of the box. In the future, if you use this exercise for warmups, you can opt to draw through your boxes. Again, this will be dealt with in 250 boxes.

So! Overall I think you've done well for this lesson. While there are things to improve, you've made a very strong attempt at everything, and have followed the key points on the lesson. I think you've gotten a good grasp of the core concepts here. Keep up the good work!