Their "Comprehensive system design 5 Day" looks at the electrical side - Crossovers/phase setting up a system from scratch theory etc. Taught by Magu Ramirez He is an awesome teacher and their teaching methords are great.
And the Sim 3 (5 day) course looks at the practicalities and measurement side of things. This was taught by Bob McCarthy (http://www.amazon.co.uk/Sound-System-Design-Optimization-Technoques/dp/0240521560/ref=sr_ 1_1?ie=UTF8&qid=1337079620&sr=8-1) He is a legend.
They also run a "Mixing workshop" taught by Buford Jones (Pink Floyds engineer) He explains how he and other engineers approach mixing. Gives you lots of ideas to bring to your own mixes.
They will blow your mind with theory, in a good way. I did their 1 day then the 2 day first then did both of these almsot back to back. Best knowledge in the industry as far as I'm concerned. These courses use to be free. but they have started charging for them in recent years..... quite frankly they are worth every penny.
D&B do an introduction to line arrays and basic systems.
Soundcraft run a thing called "Going live" which is a workshop with a few pro engineers teaching. Also all digital desk manufactures run courses for their digital desks. These are very helpful.