Applied online, still going through the process.
Phone interview with a current trainer. Nice chat, very comfortable. Be sure to prepare questions. They will answer many of your questions, but it always helps to have one or two that may help make a positive impression.
Online Assessments. I did the personality test, along with the big grouping of language, math, and programming tests. I also did the writing assessment. It's tedious, no doubt about it. You've just got to gird up your loins and get after it.
Location Interview. You must teach a 15 and a 2 minute lesson to a current group of employees. The 15 minute lesson can be on any topic, the 2 minute lesson should be on an everyday task. They'll supply a whiteboard (which I'd find a way to use!), but no Power Points or visuals. I suggest choosing lessons that don't require a lot of supplemental materials. Make it about you, you're the star of the show. It definitely seems that they're looking to see that you are personable, poised, and engaging.