I’ve created an online training course called Design an iOS Prototype in Sketch 3.
In that course I teach students from the ground up on how to use Sketch 3. After the basics are covered we work through designing a fictitious client project called SchoolBook. The course wraps up with the students bringing their screens into InVision and making a clickable prototype that can run on their smartphone.
Some of the topics covered in the course are:
* Creating User Stories
* Creating Application Flow Diagrams
* Designing Grey-scale Wire Frames
* Basics of Color Theory
See the course on Udemy.