Lines: It's goo you already know what the problem is with your lines butdon't beat yourself up so much about your lines curving is a common problem they are confident which is way more important. The way the curves are occuring suggest you are using the ghosting method incorrectly. You seem to focus to much getting to the correct page. Instead of making the mark on the page, try to focus on gesture of making the mark through your arm. You also have a minor accuracy issue with your ghosted lines remember focus on making the gesture with your arm not making the mark on the page.

Planes:

You seem to have trouble with forshortening planes because your midpoint lines don't meet where the corner lines meet. Remember when forshortened planes are in persepective therefore the experience distortion so the center of the plane is where the x forms. Be sure to add some forshortened planes to your warmups.

Ellipses:

Your ellipsies are really good they are tight and accurate and there's no mistake I can identify.

Boxes:

Part of the problem with your boxes comes from you issue with woobly lines but we've already addressed that. Other than that are issues with perspective and forshortening but the purpose of the 250 box challenge is to address that.

Good job you are ready to move on to the next assignment.