Starting with your form intersections, these are coming along nicely. You're demonstrating a good understanding of how the forms relate to one another in space through the intersections themselves. Your use of line weight is a little clumsy at times, though this is primarily from it just being laid on a little thick. Remember to keep your line weight subtle, like a little whisper rather than a shout.

Moving onto your object constructions, for the most part you're frankly doing an excellent job. You're demonstrating considerable patience and care when it comes to subdividing your forms as extensively as is needed to establish all of the complexity a given object requires, and I'm not seeing you skipping steps.

Some of these are especially complex - the screwdriver for instance has a lot going on, even at the tip where you didn't neglect to pin down the very specific cuts of the bit.

The only construction I felt did skip some steps was with the camera, and despite that it still came out looking pretty good. The main thing that's lacking here is in all the little details and elements - instead of subdividing the enclosing box to figure out where they ought to go in more specific terms, and to provide yourself with the structure needed to keep parallel edges in line with the rest of the construction, you eyeballed it.

While your capacity for eyeballing those kinds of things is clearly pretty good, this course relies heavily on students taking the time to do everything explicitly. Approximation is based on instinct and spatial awareness, both things that the course itself trains specifically by having students go through all the steps each time. After all, training instincts by relying on one's instincts generally doesn't yield much progress - like the blind leading the blind.

Of course, this was the only drawing out of many where you took those shortcuts, so it's not a big deal here.

Now, with that compared to an object as seemingly simple as the towel hook (which you subdivided as much as humanly possible and achieved an excellent result with), it does show that even with very simple things, a lot can be done to nail it just right.

When it comes to your struggles with cast shadows, despite your perceived difficulty with them, the ones you did draw (like on the toaster) came out just fine. I do wonder however if you purposely neglected to draw them because of that lack of confidence - in which case, the only way to get better at something is to try. Students frequently avoid things they're uncertain of because they're worried about "ruining" their drawing. That whole way of seeing things is fundamentally incorrect - because these are not works of art. They're exercises, they're things we do in order to learn, and if we screw them up because we tried something and failed, then they have still served their purpose. But if they come out beautifully because we neglected to push our own limits, then they fail in their singular goal.

One last thing I wanted to call out was the bit of hatching on the handle of this drawing. While hatching in general should be avoided (in this case it would actually be a simple cast shadow, with a clean edge), it's worth sharing that when you do actually add hatching to something, it is generally best to ensure that it fits between specific edges, rather than stopping at some arbtirary point. You can read more about this in these notes.

Anyway, all in all, your work is coming along very well. I'll go ahead and mark this lesson as complete.