If you're looking for "Helping Them Take the Old Man Down" or "Clockworks," you can now get them bundled together for one low low price ($2.99) at Amazon:
I made a few (inevitable) minor changes—a word here and there—as I went through the formatting process, but with those exceptions, the stories are identical to how they appeared when they ran in Asimov's. If you've already read the stories and opt to not purchase them, please say a few words of review at the link.
I don't have a Kindle, but I do have the Kindle app for Mac, which I recommend. On a fully keyboarded computer, the Kindle app allows for great ease in annotation (the kind of thing an English teacher appreciates).