Guides are exhaustive manuals that cover everything you need on a specific topic.
Articles are short pieces that focus on a given concept or programming task.
Started by RubyMotion enthusiasts, MotionCasts aims at delivering high-quality, professional screencasts around RubyMotion technologies.
If you need a bit of help getting started with RubyMotion, look no more! Check out their free introductory screencast.
If you are new to Ruby, we also recommend their online Ruby Programming Course which covers the fundamentals you will need.