Wow, I'm overwhelmed by the amount of email I've been getting! I'm 'off track' on a year round school system so I have a little more time to get things going here. Five people emailed asking about or recommending 'Teacher bags". I use a rolling cart myself, but here are some that were recommended. Thanks so Mark, Susan, Jennifer, Alexis and Michelle!
Saddleback Leather Company -- out of Europe
Dave said they "Last forever and keep all supplies easy at hand. Expensive, but less expensive than replacing an old bag every year. Plus all the bags are so 'teacher-y' or 'girly'. This was more my style.