Download from Software Development Kit for Kinetis MCUs|NXP
Using Kinetis Design Studio v3.x with Kinetis SDK v2.0
Kinetis SDK 2.0 API Reference Manual: Introduction
For older versions KSDK, KDS:
Kinetis Design Studio Videos, Part 1: Installation of KDS and Kinetis SDK
Kinetis Design Studio Videos, Part 2: Installation of OpenSDA Firmware on Freedom Board
Kinetis Design Studio Videos, Part 3: Debugging with Kinetis Design Studio
Kinetis Design Studio Videos, Part 4: Using Processor Expert in KDS
Installing Kinetis SDK into KDS Kinetis Design Studio V3.0.0- User´s Guide
other documentations you can download from Software Development Kit for Kinetis MCUs|NXP