This 3D Book has many short tutorials, so you can navigate directly to different spots in the tutorial and work through a few steps then head off to another area, if you like. It starts with the pattern command and does build, starting with the basic idea before introducing the more advanced patterning commands.

Time: 20-25 mins to complete.
Suggested Pre-req tutorials:
Introduction, Modeling, Assembly, Drafting,
(Show-n-Tell in the main top toolbar)
Product Req'd: Innovator
Min Screen resolution 1280 x 1024
Commands covered in this tutorial include:
1. Linear Patterns
2. Circular Patterns
3. Shape and Feature and Component Patterns
4. Pattern Alignmnent
5. Staggered Patterns
6. Patterns on complex curves and faces.
7. Mirror Shape, Feature and Component.
8. Mirror and coincedent faces.
9. Move and Copy