ted training over 12 months, so you dont have to pick or choose....you can take them ALL. And repeat classes if needed. (MHO)
AIRS is good with ferreting out new technologies and giving you a solid sourcing foundation. If you dig into the AIRS site, the syllabus for each course should be available. And yes...you will come away with more than being able to build Boolean search strings. PCR - more foundational CIR - more internet sourcing related.