We have already indicated several free content on the Swift (new programming language from Apple) here on the website, as one prepared by Stanford University, another by PUCRS, a Brazilian channel on YouTube, the iSwift website, in addition to two ebooks and the official Apple blog.
Now we have a different tip: this is the App Development: Teaching Swift which, according to the official description, is a collection of resources to help educators bring Swift to classrooms.
The material is available on both GitHub and iTunes U and, although it was produced by Yong Bakos (professor at Southern Methodist University), is being promoted as an official Apple content.
If you are self-taught or a teacher, there is one more option of material for both you to learn and to help in your teachings; now, if you want to enter this world and prefer to study with a teacher, our Quaddro partners are the right professionals for that.
(tip from Fabio Fiss)