Starting with your form intersections, your work here is coming along fairly well, save for a couple little bits of awkwardness - your spheres, for example, do appear to be a point of difficulty for you. That's pretty normal - with those wider ellipses, they can definitely be quite challenging, and it becomes all the more important to ensure that we're engaging our whole arm from the shoulder. One more important thing to keep in mind with this exercise however is just to put more into actually filling up the page. With any exercise, don't give yourself an arbitrary standard of "completeness" - strive to fill the page as best you can, just so you know you got as much as you could out of the exercise. Sometimes students end up giving themselves limits based on how much time they have - but don't be afraid to let a single exercise or drawing take multiple sittings if necessary. That's what'll continue to give you more and more mileage on figuring out these spatial problems.

Moving onto your object constructions, I feel you've done an especially good job with this lesson. I can see that you started to ramp up towards the beginning, getting a feel for the approach of employing the approach of subdivision and such, but as you got into more complex subject matter like the water filter and jar, you definitely showed a great deal of patience and care in breaking each object down as much as possible and pinning down all of its features in very specific terms. I'm not seeing you skipping steps or trying to do anything in your head - everything is specifically laid out on the page openly, in a manner that lines up well with how each of these drawings serves as its own little exercise.

Despite being relatively simple, I was paritcularly fond of the alkaline battery - you handled its rounded corners very effectively, and positioned the little nodes for the connectors across the top fairly well.

While I'm very happy with how it came out, there are things that could have been done better. You could have gone just a touch further here, in subdividing that top face a little more to more specifically establish where the edges of those cylinder-boxes would go - right now you positioned them more arbitrarily based on the center point, but you could have ended up with boxes/cylinders of different sizes. Another option would be to draw the first box/cylinder, and then draw an edge across the width of the battery along its two opposite sides to more specifically position the others.

This goes double for the little screw-heads along the side of the battery, which were positioned more arbitrarily. Definitely a skipped step, even if just a minor one.

One thing I am happy to see you employing here is that you drew through the box forms in their entirety - that's something that was certainly missing in some of your other constructions, like the water container, and parts of the webcam. Being sure to draw each and every form in its entirety is important, just to better understand how it occupies all three dimensions of space, and therefore how it relates to the other forms that may attach to it.

Anyway, all the same I am still very happy with how these came out, and I can see your grasp of 3D space developing quite nicely. I will go ahead and mark this lesson as complete, so keep up the great work.