WP 101 offers a comprehensive library of WordPress programmes with excellent captioned videos.
Easy WP Guide is a simple, easy to read WordPress manual that will guide you through the process of editing your site content.
Tuts+ features many courses and tutorials for beginners to advanced WordPress users who want expand their knowledge.
Treehouse features dozens of excellent tutorials and programmes to learn all aspects of WordPress administration and development.
WP Beginner has dozens of helpful and informative guides and tutorials for the WordPress rookie.
Learn WordPress features and functions with expert-led online video tutorials with Lynda.com — anytime, anywhere. Ten day free trial available.
The official WordPress Codex includes many tutorials for beginners, theme development and more.