Part One: General Comments
Overall, the site is content-rich and functionality-sound (i.e. links work, pages load well, and there is some good use of forms, external files and menu-effects).
The key weaknesses lie in the area of clear writing - especially at the section intros - site structure and navigation, and general page layout.
A few minor but significant changes will certainly make the site more user-friendly and thus attract, retain and educate a greater number of users.
In addition, these modifications will enhance the professional image of both ACME and its professional credential designations.