Hi, I am a teacher getting ready to go back to school (yikes!) and I'm looking for a good teacher/work bag. Last year I tried shoving my things into my MBMJ Teri, Faridah, Minkoff Cheri and all manner of handbags, finally giving up and using a North Face backpack. While the backpack is comfortable and fits everything, it's not very stylish and I hate wearing it on the subway. Any recs for a great (not ginormous, but big enough for folders, notebooks and purse items) work/teacher bag? I'm open to brands and materials. Thanks!