These are the materials for a one-day Scala and Play 2 introduction for people with a Java and Play 1 background. They probably don't make sense without the accompanying talk.
- If you're in a hurry: Scala for the impatient, a free book
- The best Scala book: Programming in Scala, 2nd edition
- First edition of previous book, now freely available: Programming in Scala
- Free Coursera course from Martin Odersky Functional Programming Principles in Scala
- Scala course from Twitter Scala School
- Odersky's Scala Levels
- David Pollak's Scala is Hard
- Zero Turnaround's Scala Adopton in Java Organisation paper