High Rewards and High Costs As States Draw Autistic Pupils
Families desperate for most sophisticated special education for their disabled children are moving from other states, even other nations, to New Jersey, Massachusetts and Pennsylvania, where public school systems offer most sophisticated private programs for treating autism; in New Jersey, where total school enrollment grew by 11.8 percent from 1991 to 1997, number of disabled students increased by 14 percent and number of autistic children registered increased sevenfold; treatment most in demand for autism is method known as applied behavioral analysis; advocates say this treatment, unlike others, offers children possiblity of eventually being able to attend regular classes; treatment is very expensive, with one-on-one coaching by trained teachers; many school districts in states like New Jersey with programs that are magnets for families with afflicted children say public schools are bearing too much of cost with too little control over which children get what care; photos; charts (L)