Nice work! To be completely honest, while I see a couple issues here and there, they are for the most part individual mistakes that are entirely understandable as one is going through these kinds of exercises. I'll still go through your drawings and point them out, but for the most part they're just par for the course.

To start, your form intersections are looking great. You're drawing the forms with confident, solid linework, your forms mostly feel consistent with one another (though there's a box to the far right of your last page for this exercise where the foreshortening is a bit too steep), and the intersections themselves are coming along great.

Moving onto your object constructions, I'm really pleased especially with drawings like your computer mouse. You've gone to considerable lengths to break everything down, subdividing as needed to place every little corner in the right position. Your result is something that feels solid - admittedly kind of simple since it's really just the core body of the mouse - but an excellent foundation that stops maybe one step short of capturing the object fully.

Skipping down to your toaster drawing, I did notice two issues - but again, both are just the sort of thing that happens. First off, the enclosing box you constructed ended up a little lopsided, with the side plane closer to the viewer being a touch smaller. To this end, I'm actually pleased with how you handled it - you didn't try to correct the mistake, and instead abided by the structure in place, resulting in a toaster that similarly had one side smaller than the other. While the result was not perfect, this is the correct way to handle such a situation. We lay down our decisions, and we stick with them.

The other issue was that big knob at the bottom of the front panel - I'm guessing this may have just been to do with the ellipse guide forcing you into certain sizes of ellipses, resulting in a cylinder that tapers instead of one that is entirely straight. At this point you could have potentially freehanded the ellipse (since we're not looking for one that's too big, it probably would have been in your skill set to achieve that), but ultimately the choice is up to you.

To that point, you do still struggle somewhat with larger ellipses. They are definitely difficult to nail down, so I recommend that you continue focusing your warmups on them - getting into the groove of applying the ghosting method, drawing from your shoulder, and so on all in the interest of tightening them up and eliminating as much hesitation as possible. Larger ellipses in planes would specifically be helpful for this.

Aside from that, your work is looking great. So, I'll go ahead and mark this lesson as complete. Keep up the good work.