This is the best teachers supply store in Brooklyn. They alway have what I need and the staff is very friendly and helpful. They also really know the materials. Ask about common core and they will know what you are talking about. They have some teachers working there. Whatever you need, they have it: workbooks, test books, posters and more. Great store.
Teachers Choice is the best teaching store I've been to so far. Anything I need, they have. If they don't, they will order it for you right away. Or amazingly, tell you which store to get it at, and even call the store and make sure they have it in stock. The staff is very helpfull. Best place for science fair supplies too.