; and (ii) examine the requirements related to the professional qualifications of such personnel in regard to sections 612(a)(14) and 635(a)(9) of the Individuals with Disabilities Education Act; (M) examine the excess costs of educating a child with a disability and expenses associated with high-cost special education and related services, including the cost-effectiveness of different practices and policies; (N) help improve the involvement of parents in order to support the educational and transitional results for their infants and toddlers with disabilities, children with disabilities, and youth with disabilities; (O) examine the unique needs, including with respect to their mental health, of infants and toddlers with disabilities, children with disabilities, and youth with disabilities, including such infants, toddlers, children, and youth who also— (i) are English learners or gifted and talented; (ii) reside in rural communities; or (iii) have the most significant cognitive disabilities; and (P) examine existing and emerging assistive, adaptive, accessible, and instructional technologies, including— (i) online delivery of services; (ii) use of such technologies in general education settings; (iii) factors that support or limit the use of such technologies, including training for students, practitioners, and parents and the interoperability of devices