I’m using custom post types in WordPress 3.0 to manage ‘courses’ (or seminars, lectures, whatever term you’d prefer to have in mind).
Now for viewing a single ‘course’, the url structure is;
/course/course-name/
But for multiple courses?
/courses/category/category-name/
Or…
/course-category/category-name/
Or something entirely different?
From an SEO prespective the least forward slashes the better.
Every level (forward slash) you put means (usually) less importance to (some) search engines.
I’d recommend you to use Level-1 URLs like
www.example.com/course-marketing-the-best-practicesOr Level-2 as much.
Some resources: