Even if you use Dreamweaver, or CMS' (such as Wordpress etc.), you're still using HTML & CSS. Unless you're only ever building simple templated sites, you'll still need to know how to knock together basic HTML and CSS code.
By the way, if you put together a tutorial several years ago, you might want to consider making sure it's still relevant. Both HTML and CSS have evolved a lot in the last 4-5 years, especially with the advent of CSS3 and HTML5.