I'm pressed for time now and can't give you the long answer this deserves, the the short answer is, yes, it will work, and yes, you are setting yourself up for challenges -- but I think that's a good thing.

For a nice, simple example, look at a software company called Datastream (their domain is .net, not .com). Note that in the upper left corner they've got an "Industry Solutions" pulldown.

You could do the same for titles or funtions (or any other splits that make sense to your market).

The big challenge is to create enough depth behind each of those links -- but a case study or two ought to do it, and much of the Web content re: your company, values, team, etc. would stay the same regardless of the "channel" you direct people down.

Search Engine Optimisation isn't static, but there are a few key rules. The good news is you can do what you want with a single site. Here's the basics:

Search engines list pages, not sites. So each of the items you want to optimise for can be on separate pages, each optimised for the key word or keyphrase you want. That is why you can do it on a single site. Now, a few pointers on how. Search engines try to think like a person does so that their rankings are relevant to their customers (the searchers, not you). Search engines treat the following as important. My example uses a fictional business optimising for wheelbarrows for kids:

1 - URL (www.wheelbarrows-for-kids.com)
2 - page name (/products/wheelbarrows-for-kids.html)
3 - page title ("Wheelbarrows for kids" at the top of IE)
4 - content ("wheelbarrows for kids" appearing often in the text of THAT page)
5 - headings ("wheelbarrows for kids" as a heading 1, heading 2 or bold)
6 - special tags ("wheelbarrows for kids" used in meta tags, site description, alt image tags and more. For this reason, microsites are a good idea so you can have site-wide metatags within the microsite which don't compromise your other search terms)

I hope this helps. If you need more, we have a detailed 'how to' guide published this month. You can get it at www.mathmarketing.com It's in the 'what's new' section of the home page. You'll have to sign in to get it because it is a valuable document. It's packed with clear steps about what to do and why.

Cheers, Hugh

Your site looks very nice and lays out your various product offerings very clearly. I really like the testimonial on the front page. Since the search engines look at that first page, you might want to put a little extra copy that tells exactly what you do on that front page, with your keywords.

As a side note, have you ever thought about a product for parents to appraise teachers? I'm sure it's not a popular idea in the teacher's unions, but as a parent, I would love a product like that to be available in our school district. Rate things like the teacher's grammar in their newsletters to the parents, general teaching ability, communication, general aptitude for teaching according to the child's needs, etc. as viewed by the parents.

Lisa