I've looked through your boxes and here are a few notes and critiques in your progress broken down into sections.

Boxes 1-50

Some of these boxes are rather small. boxes like number 7 are considered small. this will become a problem when placing only 5-6 boxes on the page since there'll be too much empty space. Plus bigger boxes are more difficult so all the more reason to make them bigger. extensionwise, a lot of these lines extend the wrong way. take the first eight boxes for example. boxes, 3 4 and 7 each extend one set of lines the wrong way and this problem can be seen throughout. each set of lines should be extending towards the tips of the Y not away from them. there are some convergence issues here. on the first page there were attempts at the converging the boxes but then towards box 50 boxes became parallel, which is fine if the vanishing points are very far away but they should never be diverging. for example even though boxes 42 43 48 and 49 have their line extensions done incorrectly, I can tell that the yellow lines for all four would have diverged. another common problem I'm seeing here is the back lines tend to diverge from the Y. as far as technique goes, the boxes look pretty solid to me. there's cases that look like you're trying to correct your lines. don't do that. if you're going to superimpose your boxes, do it on the silhouettes, not the inside of the box. there's a bit of wobbling on some of your hatching so if you're having trouble with that, it's better to ghost each line as tedious as it sounds.

Boxes 50-100

Some of these still extend incorrectly such as box 88, but if you look at box 90 that one is actually right despite it looking similar. That box is sitting at the horizon line, looking down at it with extreme foreshortening but box 88 doesn't work this way. Those lines will end up converging upward instead. With time and observation, you will learn why that's the case. Speaking of which, a few of these still diverge, but becoming less frequent. Good job on that! The next thing you should work on here is converging your boxes better. Sides facing away from you tend to converge too early in a number of cases (boxes 64, 69, 74, 77, 79, 80, and 81) if you're not already using the dotting method to plan your convergences, you definitely should. It really helps a lot. another thing you can do is run your finger farther from the Y where you think the line should extend and place a dot halfway. I find that to produce much more accurate results.

Boxes 101-150

The issue with Divergence and line extension generally improves here. Boxes are also much bigger. Good job on those! As far as convergence is go, some of the same problems are there but are more inconsistent. Back lines diverge (boxes 102, 105, 109, 113, 114, 115, 118, 121, 122, 125, 127, 128, 130, 136, 140 and 145) but some of them are becoming due to outer convergences and less on you. Hatching is becoming more confident. Good job on that! Make sure you're superimposing all the boxes to get in more practice out of it.

Boxes 151-200

your convergences are improving but there's still room for improvement. A lot of your shower boxes are just parallel lines. You should try to do more boxes where Vanishing points are far enough away that the convergence is noticeable but not so close that they fall within the page. Boxes 188 and 189 are good examples of this. If you're still struggling with the back lines, remember you can apply the dotting method there too and run your finger farther away for more accurate results. On boxes 156-160 you seem to have drawn the same boxes but hatched on different sides as if you weren't sure which side you should hatch. The lesson stated the front side should be hatched. So generally speaking, the front side should be whichever side of the Y is closer to 90 degrees since that side will always be facing towards you, which means that boxes 157 and 159 are the correct place to hatch them. Box 160 is correct in cases of dramatic foreshortening where the box is offset from the camera and the other faces are clipped from view. Otherwise, not the front side.

Boxes 201-250

Honestly, all the major flaws found on your first 50 boxes are nowhere to be found here. The size is good. Lines extend where they should. Avoiding parallel lines is something that can still be worked on but at least almost none diverge anymore. Reoccurring issues have lowered in magnitude and frequency and a few almost converge perfectly (boxes 206, 208, 215, 227). You can do more boxes as warm ups (2-4 boxes) if you'd like since we're never really done with boxes and take the information into consideration moving forward. Your boxes can and will improve with time and practice. A tough road lies ahead. I'll mark this as complete. Good luck with lesson 2!