Oakland Unified is facing compliance deadlines to prove it is monitoring students at private special education schools.
The investigation concluded that the district violated federal education and disability law.
Officials examining Tobinworld and other schools in California.
The letter was sent after a 9-year-old was slapped by a teacher's aide.
The state investigates allegations of abuse at Antioch special education school.
The state suspends certification for two Tobinworld schools.
The least-trained staff often are involved in restraining students.
California Department of Education no longer required to collect data on reported incidents.
Edsource created easy-to-read downloadable data cards for most of California's Special Education Local Plan Areas.
Limited data and inconsistent reporting makes it difficult to understand what is happening on the ground.