These modules includes document and videos that explain SharePoint Web Content Management (WCM) architecture, bulding content management sites, server infrastructure and deployment.  So if you are learning or working on SharePoint WCM, these modules are definitely a good starting point.

A total 6 of modules are available for download:

• Module 1 - Web Content Management Overview
• Module 2 - Architecting Content Management for your web site
• Module 3 - Server Infrastructure and Content Deployment
• Module 4 - Securing a Web Content Management System
• Module 5 - Optimzing Performance for Web Content Management
• Module 6 - Extending Web Content Management

More details

These are very good introductory online course if you are a .NET developer and interested to learn more about SharePoint. 

A total of 12 modules are available:

Module 1: Developing Solutions on SharePoint Platform

Module 2: Web Parts

Module 3: Page Navigation

Module 4: Page Branding

Module 5: Data Lists

Module 6: Web Services

Module 7: Event Handlers

Module 8: Content Types and Site Columns

Module 9: Workflow

Module 10: User Management

Module 11: Silverlight

Module 12: Deployment