A considered and constructive assessment by the author of The Crack In the Picture Window examines the two mainstreams of American education. Mr. Keats sets up two prototype schools -- one of which will roughly represent yours -- taught by Miss Alpha-a Dewey disciple -- who stresses the Life Adjustment phase of education. On the other hand there is authoritarian Miss Omega, devotee of drill and discipline. At a higher level you will tour Pragmatic Tech which offers 63 courses -- pin-curling and auto-driving- and assures only a ""little more than basic literacy"" as against Mental Prep with its entrenched curriculum. A lively stylist addresses a parental public.