The purpose of this article is to understand the decision-making processes by assessment personnel when choosing instruments to evaluate students with learning disabilities. Eight school personnel responsible for the evaluation of students in Texas participated in face-to-face, semistructured interviews. The instruments chosen were based on a variety of factors including the personnel's basic knowledge and training on the use of the instruments, the culture and climate of the district, and the overall characteristics of the child being tested. The findings of this study suggested that assessment personnel encounter many decisions when evaluating children with learning disabilities. Implications from this study include the need for frequent support in encouraging reflective thinking and assessment training for those responsible for the important decisions regarding the identification and placement of students who are learning disabled.