There is established in the office of the superintendent of public instruction an administrative section or unit for the education of children with disabilities who require special education.
Students with disabilities are those children whether enrolled in school or not who through an evaluation process are determined eligible for special education due to a disability.
In accordance with part B of the federal individuals with disabilities education improvement act and any other federal or state laws relating to the provision of special education services, the superintendent of public instruction shall require each school district in the state to insure [ensure] an appropriate educational opportunity for all students with disabilities beginning at three years of age and concluding at the end of the school year in which the student turns 22 years of age. The superintendent of public instruction, by rule, shall establish for the purpose of excess cost funding, as provided in RCW 28A.150.390, 28A.160.030, and 28A.155.010 through 28A.155.160, functional definitions of special education, the various types of disabling conditions, and eligibility criteria for special education programs for children with disabilities, including referral procedures, use of positive behavior interventions, the education curriculum and statewide or district-wide assessments, parent and district requests for special education due process hearings, and procedural safeguards. For the purposes of RCW 28A.155.010 through 28A.155.160, an appropriate education is defined as an education directed to the unique needs, abilities, and limitations of the children with disabilities who are enrolled either full time or part time in a school district. School districts are strongly encouraged to provide parental training in the care and education of the children and to involve parents in the classroom.
Nothing in this section shall prohibit the establishment or continuation of existing cooperative programs between school districts or contracts with other agencies approved by the superintendent of public instruction, which can meet the obligations of school districts to provide education for children with disabilities, or prohibit the continuation of needed related services to school districts by the department of social and health services.
The provision of special education services until the end of the school year in which a student with disabilities turns 22 years of age is not intended to reduce or supplant any other service that a student may be eligible for.
This section shall not be construed as in any way limiting the powers of local school districts set forth in RCW 28A.155.070.