I’ve just finished a series of four articles for SQL Server Pro Magazine, along with sample projects and hands-on exercises. The series will take you through SSAS Tabular model design from start to finish, using the Adventure Works sample data in SQL Server 2012 or 2014.  Follow these links to each article in the series:

Part 1 – Getting Started with SSAS Tabular
Part 2 – Easy DAX – Getting Started with Data Analysis Expressions
Part 3 – Tabular Model Administration
Part 4 – Deep Dive DAX – Solving Complex Business Problems with Data Analysis Expressions

Download the sample projects here:  Part 1, Part 2, Part 3, Part 4