Starting with the form intersections, there are a few notes I've added to your page here. The most important thing you can do with these is to take more time in assessing exactly which surfaces from each form are relevant for each section of the intersection line - in the sense of the intersections being made up of "pairs of surfaces" as I described in my original critique. I would also pay more attention to this diagram which I had linked previously - I noticed that the sphere/box intersection you did on your page is a direct match for this, but that you ended up reversing the intersection lines. This suggests fairly strongly to me that you may not have taken the diagram into consideration as much as you could have, and that you may have more room to make use of the information being provided.

As for the object constructions, your work here is making excellent use of orthographic plans, subdivision, mirroring, and so forth, so it's coming along great. Just a couple notes:

• You will find these kinds of constructions easier if you use ballpoint, which as noted in the lesson material is encouraged here, in the 25 wheel challenge, and in Lesson 7.

• There are a number of places where you went back over marks a number of times. I'm guessing this was to correct mistakes (which you should not be doing - let your mistakes stand for themselves, attempting to correct them will lessen their educational value while also making the construction itself much more cluttered and harder for you to navigate), but if this was an attempt at applying line weight, I recommend you review the material on line weight from here in Lesson 1. The video from that section goes into detail on how we employ line weight in this course, and why.

I'll go ahead and mark this lesson as complete - the object constructions are coming along well, and while the form intersections have their issues, these are things you will want to continue practicing, and we will revisit them as part of Lesson 7.