District students at all grade levels are identified in accordance with Texas Education Agency guidelines, using a process for nomination, screening, and selection.  Nominations may be received at any time from teachers, parents/guardians, administrators, counselors, or community members.  Assessment tools that are both quantitative and qualitative may include, but are not limited to the following:  achievement tests, intelligence tests, behavioral checklists completed by teachers and parents, classroom academic observations completed by teachers and as appropriate, student work products, report card grades, and state assessment instruments.