NMF is the national merit federation. If your son scored very high on his PSAT he might be in the running for it. A few colleges still give very high scholarships for national merit finalists, although most of them are in the southeast. Washington U in St. Louis has some highly competitive full tuition merit scholarships. Mostly though for merit you need to look a tier down - merit is used by schools to attract students who might otherwise go to a slightly more selective school.