; (B) to support teachers of children and youth who are blind or visually impaired and related services personnel through state-of-the-art continuing education opportunities; and (C) to spur the further advancement of instructional services for children and youth who are blind or visually impaired through scientific research and evidence-based best practices. 4. Definitions For purposes of this Act: (1) The term deafblind , when applied to an individual, means the individual has concomitant hearing and visual impairments, the combination of which— (A) prevents access to information; (B) causes severe communication challenges; (C) interferes with social and emotional well-being; and (D) impacts other developmental areas in a manner that adversely affect a child’s educational performance (including children who are deafblind with additional disabilities). (2) The term deafdisabled , when applied to an individual, means the individual is deaf and also has at least one other disability, but excludes individuals who are deafblind. I IMPROVING THE EFFECTIVENESS OF SPECIAL EDUCATION AND RELATED SERVICES FOR CHILDREN AND YOUTH WHO ARE DEAF, HARD OF HEARING, OR DEAFDISABLED A General Provisions 101. Identifying children and youth who are deaf, hard of hearing, or deafdisabled (a) Serving all children who are deaf, hard of hearing, or deafdisabled regardless of classification Section 612(a)(3) ( 20 U.S.C. 1412(a)(3) ) is amended at the end by adding the following: (C) Serving children who are deaf, hard of hearing, or deafdisabled When a State classifies children by disability, the State, in complying with subsection (a)— (i) identifies, locates and evaluates children who are deaf, hard of hearing, or deafdisabled who are, or may be, classified in a disability category other than deaf, hard of hearing, or deafdisabled