Peer effects can also have a negative impact, according to researchers in Ohio: Being around students with poor language skills tends to be a drag on children with disabilities.
Allowing students to potentially stay in private schools until all appeals are exhausted could be an expensive prospect for many districts, argues the National Association of State Directors of Special Education.
The three-day event, sponsored by the U.S. Department of Education, focuses on everything from early education for students with disabilities to transition planning.
Observers say the District of Columbia schools, which has had a dysfunctional special education program for years, has been making notable improvements.
The monitoring reports released by the Centers for Disease Control may be flawed because they don't include a clinician's evaluation, say the editors of an autism research journal
The new measure allows IEP teams to create graduation requirements, but that may end up running afoul of current federal policy, according to a recent letter to John White, the state's school chief.
An outdated formula for allocating federal money is leading to what may be unintended funding disparities, according to a recent policy brief from the New America Foundation.
The evaluation system used in previous years focused on compliance, but not as much on how well students were learning, said Education Secretary Arne Duncan.
The U.S. Department of Education says fewer states are "meeting requirements" for students with disabilities as the department shifts to evaluating states on how well those students are being educated.
Voucher supporters say that information from the investigation will be used to damage choice programs in the state.