your boxes are well angled and you maintained make a confident lines till the end of the lesson, this is perfect, but remember the there are two types boxes construction in perspective which is the shallow boxes and the dramatic boxes, you did a lot of shallow boxes and less of dramatic boxes that can even be numbered while going through the drawings. practice more on dramatic boxes, your shallow boxes are really awesome, and make sure you make use of the 50% rule. wishing you best of luck on your next lesson (lesson 2)