4:31 AM, Tuesday May 5th 2020
Nice job finishing the challenge!
Several of your later boxes have lines extended improperly, 213 and 214 for example, the lines for these boxes would be diverging if you had extended them in the proper direction. The number of later boxes with this mistake is something to pay close attention to, If you plan out your box and where the faces orient you should be able to avoid this problem. Remember, that the closer a plane is to you the less of it you will see as explained here.
I also think you would benefit from drawing less boxes per page, the recommended amount is 4-5, drawing them bigger helps you plan better even if it's harder to get accurate lines, you will get better at it.
Your hatching looks a bit rushed, make sure to make every stroke count, every line is a chance to practice confidence and accuracy.
Next Steps:
I would like to see you work on 20 more boxes, with only 5 boxes per page, carefully plan out your box with the dot method and try to imagine what your box will look like before you finish constructing it.