In their efforts to make the selection and hiring process more efficient, school administrators utilize teacher selection instruments such as the Web-based TeacherInsight™ assessment tool (The Gallup Organization, Princeton, NJ). Tools such as these instruments are now used regularly by school systems across the nation to assess teachers regarding their knowledge, talents, skills, attitudes, and values. According to Gallup, the TeacherInsight is a predictor of teacher talent and is based on 12 themes. This study utilized 132 elementary and secondary teachers and approximately 4,500 students currently enrolled in Grades 3 through 11 to determine if the TeacherInsight is a predictor of student achievement. This study considered: (1) the relationship between the TeacherInsight and student achievement as measured by the Texas Growth Index (TGI); (2) the relationship between teacher characteristics (years of experience, level [primary or secondary], gender, age, degree) and the TeacherInsight instrument; (3) the relationship between teacher characteristics (years of experience, level [primary or secondary], gender, age, degree) and student achievement as measured by the TGI; and (4) the relationship between student classifications (limited English proficient, economically disadvantaged, at-risk) and student achievement as measured by the TGI. The analyses found a very weak positive relationship between the TeacherInsight and student achievement using the TGI in the subjects of English/ reading and math. Additional analysis based on levels (primary and secondary) between TeacherInsight scores and TGI values were not significant. Teacher characteristics were poor predictors of scores on the TeacherInsight. Of the characteristics, years of teaching experience was the strongest predictor of scores on the TeacherInsight. Although the overall analyses indicated significant relationships, they were very weak for both English/reading and math. Teacher characteristics were also poor predictors of student achievement. Again, the overall analysis indicated a significant but weak relationship for both English/reading and math. When considering the relationship between student classifications of LEP, economically disadvantaged, and at-risk, only at-risk had a weak relationship to student achievement. The findings provide little support to the validity of TeacherInsight in terms of its ability to predict student achievement scores and its usefulness as a tool for the selection of teachers by school systems. Until more extensive research is completed on the TeacherInsight and its impact on student achievement, no definitive answers for school systems can be made. Suggestions and recommendations for future studies are provided in the discussion section.