They’ll be the people presenting the material and helping you out most often in the support forum:

Part 1: Introduction

Session 1: Introduction to the Course

Part 2: Getting Started

Session 2: Suggested Editors
Session 3: CSS Overview
Session 4: Firebug

Part 3: CSS Basics

Session 5: CSS Syntax
Session 6: Inline Styling
Session 7: Separating Style from Markup
Session 8: Separate Style Sheets
Session 9: Getting Specific with CSS

Part 4: CSS Typography

Session 10: Font Transformation
Session 11: Font Family

Part 5: Styling CSS Elements

Session 12: Block Elements
Session 13: Inline Elements
Session 14: Margins and Padding
Session 15: Borders
Session 16: Table Styline

Part 6: IDs and Classes

Session 17: Introduction to IDs and Classes
Session 18: Advanced

Part 7: Background Images

Session 19: Introduction
Session 20: Repetable Images
Session 21: Dimensions and Positioning

Part 8: Positioning Elements

Session 22: Intro to Floats
Session 23: Fixing Floated Issues
Session 24: Relative and Absolute Positioning

Part 9: Quick Tips

Session 25: Horizontal Nav
Session 26: Column Layout
Session 27: Overriding Styles
Session 28: Commenting Code
Session 28: Joomla CSS Tip #1
Session 30: Joomla CSS Tip #2

More info: http://www.ostraining.com/coding-training/