Mary, yes. She has a section on working with high schoolers using her system. I wasn't particularly interested in setting my Catherine up with this, but after watching Catherine spin her wheels all day today. . .I'm considering it!
For the younger set, I would definitely say that using clear plastic bins (or drawers) is key. Her system caught my eye because it follows several suggestions for organizing for ADD types. Visual cues are very important. Having boxes that the child can pick up, carry to where they do their work, and then pile up/put away somewhere is a good thing -- they see immediately that their work pile is decreasing as they go. Also, they can peek into the boxes and see things like "No way! A brownie mix for me to bake today!" or whatever you've put in there for fun. (Ah, remember that? Homeschooling is supposed to be fun? LOL) This motivates them to focus and work through the next couple boxes in order to get to the one with the fun stuff.
Leslie Nelson's blog, linked in my initial post, has some great photos of the wire racks and bins she set up -- many kids, small space. I'm impressed! And, you said it, Sharon! Rolling carts with clear drawers which can be slid away into a closet or something at the end of the school day -- now that's a visual cue that you're done!
She's got some great ideas in here. There might be one or two things I don't need to implement in my homeschool, but most of the system (and it is a system, not just a "buy some boxes and throw your stuff in there"!) appeals to me. I'm loving HOD so far with Sam, but I find myself scrambling at the start of the day to deal out his assignments in a way that keeps balance. The lesson plans are awesome, but I still need to decide in which order to serve them. And that can change depending on how quickly a child is grasping things, what your week looks like, and so on. Then there's the non-HOD things that we all want to try and fit into our weeks. The workbox system is that other piece I was looking for. I think it's a tool that will enable me to keep on top of things, because I'm a person that needs visual reminders in front of me. (Must be that 40 year old brain of mine!) His work in the workboxes, my stuff in my Desk Apprentice. . .I'm good to go!