This is a Sources Sought notice for market research to inform a future procurement for a turnkey Alternate Assessment ecosystem for BIE schools nationwide. The project would involve providing and managing standardized assessments in ELA, Mathematics, and Science for eligible students in grades 3-8 and 11, with services beginning with the 2026-2027 school year through potential option years. The required solution must be a fully operational, commercially available product with proven alignment to specific educational standards. Key services include assessment administration, a dedicated student registration portal, comprehensive reporting, training, and helpdesk support. All systems and data must remain within the Continental United States.