they seem to be planning on using the schools for the initial screening. they can simply give the kids a brief questionnaire, and when kids score above a cut-off point, refer them to the school psychologist for further evaluation.
it wouldn't be hard to screen the entire school-aged population. they could also require all doctors to do the screenings. then they could spread out from there.
and most people in our country go thru the schools at some point in their lives.