I've always wanted to find decent CTI training that's cheap or free, and there isn't much out there; at least not all in one place. So, I decided to build it and then share it with whoever wants to learn. See the Academy tab.
Most of this is foundational knowledge that will give you enough skills and at least a small change in your thought process to start or transition into the CTI field, or to add CTI fundamentals to your current job. Have fun! Keep moving forward and keep learning.
\m/ Stone