One of my favorite stores is Ann Taylor Loft. They have cute clothes that are very teacher friendly. This is my most recent purchase from ATL.
I also like these:
Beaded Rose Tee
Other things I am obsessing over at the moment are all from etsy.com (of course)
--This sweet little necklace!
--And most things from this amazing Etsy shop: (especially the pebble necklace) kasiablue