(1) Local educational agency or the term "school district" as used in this chapter, means a public board of education or other public authority legally constituted for either administrative control or direction of, or to perform a service function for, any combination of public elementary and secondary schools, or for a combination of school districts.

(2) The term includes any other public institution or agency having administrative control and direction of a public elementary school or secondary school, including charter schools, educational service agencies, the Washington center for deaf and hard of hearing youth, and the Washington state school for the blind.