Hi there, looks like you are off to a pretty good start. Here is my feedback.

Lines (overall): Wow, you do a really good job at starting each line at the first point. Good job, keep it up. You do have some slight wobbles and arcing here and there, try to prioritize drawing straight lines first. Accuracy will improve as you get more used to drawing straight lines using the ghosting method and shoulder muscles. One minor thing, for the ghosted planes it seems you skipped plotting the lines which cut the plane in half (if ? is your plane then the + lines you draw after the x). It is recommended you plot points and ghost for every line, because it gives you more opportunity to practice the ghosting method, just something to keep in mind. (p.s. I like the numbers in the super imposed line exercise, thought it was neat.)

Ellipses: Good start on ellipses! For ellipses tables, you go a pretty good job of keeping the angle at which they are leaning pretty consistent. They tend to angle slightly more on the funnels exercise, so keep that in mind. A lot of your ellipses were drawn over more than 3 times, which is excessive. Focus on tightening up ellipses first, and then improve on accuracy (hitting the boundaries).

Boxes: Keep up drawing through each box. Nice convergences on your rotated boxes, good job using nearby lines to help guide you. However, your lines start to get more unsure of themselves (wobbly, some discontinuous, some repeated). Again, first priority should be making confident lines. If you miss a point, that's ok. Construct the box using the new line. Don't fall into the trap of repeating over your lines as well. View each mistake as a learning opportunity and correct those mistakes with your next attempt. You will draw better with practice. (Also oooh, organic perspective boxes moving far away and then closer again, that's pretty neat.)

Anyways, you got this, keep it up!