Few Using Vouchers to Pay for School
NY Times survey of educ vouchers, 5 yrs after system has been widely proposed and debated as device for broadening educ choice and giving parents more input, finds idea is still having difficulty taking root; notes few school dists have accepted millions of dollars in Fed money alloted to test concept, under which family could shop for school services with voucher worth what local dist spends to educate each child; describes in detail how Alum Rock Union Elementary School Dist, San Jose, Calif, has developed, albeit highly compromised and ltd voucher system; notes Alum experiment, reaching end of 3d yr of operation, has revealed inconclusive results; says Alum experiment has dispelled fears of racial segregation since ethnic distribution in voucher schools differs little from over-all ethnic make-up of dist; notes arguments of opponents of vouchers, which focus on possible racial and econ segregation factors; cites critics' view that Alum Rock is not so much free mkt voucher system because only pss are involved; concludes that Alum Rock has not borne out assumption of voucher advocates that, given meaningful choices, parents would take active role and make intelligent decisions for their children; illus (L)