Piece-wise defined functions
are quite manageable if you introduce the idea to your students with a well organized, step-by-step, visually appealing presentation.
This introductory lesson was designed in Smart Notebook
software and is fully editable.
If you do not want to use it in this format, a pdf version
is also included.
A free trial of Smart Notebook software is available from their website.
Click here: https://www.smarttech.com/downloads
Or, you can use their online version, which is slightly less versatile.
Click here: http://express.smarttech.com/