Quick one today - several people have asked where I found the crates that I use for my folders (see here and here for info on the folders).
Originally I purchased them at Amazon, but at the time I was able to get 7 of them for less than $26; now they're over $10 each, eep!
However, if you go directly to the company that sells them, they are $5 each with free shipping right now, and I personally think they're definitely worth that.
I'll also mention that these particular crates apparently fit perfectly in the Thirty-One utility tote that is so popular amongst teachers these days, a great way to keep files organized in your super-cute bag! If you have no idea what I'm talking about, click to view the organizing utility tote that's all the rage right now on the main website, or support a fellow teacher who "deals" bags on the side over at her blog, The Caffeinated Teacher (great teacher blog by the way, even if you're not interested in the bags!).
This pic is from late November - well, must have been November 22nd to be exact, given that I have a picture of President Kennedy displayed. You can see how the folders begin to show their wear toward the end of the semester (and there's always one that gets WAY more love than the others, as you can see from #9 here).