I'm accustomed to giving feedback for these things, and I sometimes miss out the customary positive stuff. So. Wow. Super. Cool. Funky. Thanks. Have some rep. (etc)
Note that all of these points are debatable, feel free to ignore all of them, or just the ones you think are particularly stupid. I'm sticking to writing style, spelling and grammar stuff.
Intro
"I think", "hopefully", etc - Marks of good humility, but bad form in this kind of material. Be bold, and drop the qualifiers.
"you have probably figured out" - again, just state it. Talking about what I or other dances might or might not have figured out gets in the way.
First person writing. Some folks do first person well. Given the above point, I'd recommend rewriting it in third person, and then getting rid of anything that looks stupid (eg, "the author thinks that..." looks stupid).
"most people just collect moves" - your aim should be to discuss dancing, not dancers.
"The author" - I'm interested in: Dancing experience, dances known, teaching experience, competition experience. Your self-descibed style (again, less humility).
I'm not interested in: the forum (ick - advert), what other people describe your style as, general self-puffery.
"Loose" is what you do to chained animals: you set them loose. "Lose" is what you do when you no longer have something you used to have, such as chained animals.
Pages 3-4
Vastly improved on the first couple pages. You seem to have warmed up by this point. Good.
Different colours and indenting for exercises - good. Looks like you've thought about how it'll work when printed in black and white, which is very good.
"Think about it" - fluff. Delete.
"air piston" - I liked this.
"board" is what you play monopoly on. "bored" is what pedants make you feel.
Pages 5-6
Three exercises in a row. Ick. Space 'em out.
As an online tutorial, you should be linking to a site with fuller descriptions of existing moves (eg catapult), pref. with diagrams. This will reduce name confusion (eg, JazzJive catapult is different to Ceroc catapult, etc).
"Man spin variant, fixed man" is a "slow man spin" in Ceroc, if you care.
Dips and seducers... no, I think you're wandering off core material here.
The rest
"Personally", "I would recommend" - confidence, man, confidence!
"help the m" - Equal rights for all letters of the alphabet!
"the ma only has hold of the left" - good nod towards female leaders. Also, left what?
"Well, that's it" - too apologetic.
Good recap at the end. Good style.
Weird extra para breaks (in PDF, anyway)
Don't need your email - it's at the bottom of every page
"This document is not copyright" - you mean "this document is not copyright
ed". Would be good to say instead/as well "this document is public domain" and link to
http://creativecommons.org/licenses/publicdomain/
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All in all, a nice piece of work. Lots to think about.