I made the pieces 10.5" x 12.5" (instead of the usual 10.5" x 16.5"). This gave me a more square basket. I didn't have the right interfacing on hand, so I just used some leftover batting. I also messed up fussy-cutting the handles, but I didn't feel like redoing them. The black probably wasn't the right fabric to use for them, but I really was pressed for time, so I just went with it.
I still haven't figured out what I'm going to put into it--I have a few more days!
Overall, I'm happy with how the basket came out, and I'm sure I'll be making more in the future. If I find a few hours this week, I might try making some for her other teachers.