Do you know the Ralph Fletcher books, Mel? They are very inexpensive ($4.99-$5.99 each when I got them), designed for young-ish kids (says 8-12 on the cover), and have a very appealing (to me, anyway) tone--Fletcher treats children as serious, capable young writers--they're very un-patronizing.
The books are called:
-"How Writers Work: Finding a Process that Works for You" (some chapter titles: Brainstorming, Breaking the Ice: Getting Started, Going with the Flow, Rereading, Revision: Radical Surgery, etc.)
-"Live Writing: Breathing Life into Your Words (strategies, ideas, and tips to fuel you for a lifetime of writing)" (some chapter titles: The Writer's Toolbox, Reading Like a Writer, Building Character, Voice: Connecting with the Reader, etc.)
-"A Writer's Notebook: Unlocking the Writer Within You" (some chapter titles: What is a Writer's Notebook Anyway? Seed Ideas, Mind Pictures, Snatches of Talk, Lists, Memories, etc.)
-"Poetry Matters: Writing a Poem from the Inside Out" (some chapter titles: Image, Poem Sparks: What to Write About, Wordplay, A Few Words About Form)
I don't know if this is anything like what you're looking for (and I'm sure Kriston will have lots of ideas!), but maybe this might be a place to have a quick look.
He has a website, let's see if I can find the address...
Aahh, it's an easy one--
www.ralphfletcher.comOn his site, he has a page of tips for young writers, some teacher handouts (things like lists of recommended books, quotes about writing, etc.), and also an invitation to young writers to e-mail him questions about their writing (sounds like a nice guy!).
Anyway, hope that helps a bit.
peace
minnie