To provide technical assistance to schools and local educational agencies, and direct services, including direct student services described in
section 6303b(c)(3) of this title to children with disabilities, to schools or local educational agencies implementing comprehensive support and improvement activities or targeted support and improvement activities under
section 6311(d) of this title on the basis of consistent underperformance of the disaggregated subgroup of children with disabilities, including providing professional development to special and regular education teachers, who teach children with disabilities, based on scientifically based research to improve educational instruction, in order to improve academic achievement based on the challenging academic standards described in
section 6311(b)(1) of this title.