We report findings of a validity study comparing two screening tools: the Student Risk Screening Scale–Internalizing and Externalizing (SRSS-IE) and the Social Skills Improvement System–Performance Screening Guide (SSiS-PSG; Elliott & Gresham, 2007). Participants were 1,680 kindergarten through sixth-grade elementary students from three schools in a northeastern state. Correlation coefficients indicated statistically significant, inverse relationships between SRSS-IE scores and Prosocial Behavior, Motivation to Learn, Reading Skills, and Math Skills subscale scores of the SSiS-PSG. Test–retest stability analyses suggested SRSS-IE and SSiS-PSG scores were stable between fall and spring administrations (p < .0001). Educational implications, limitations, and future directions are offered.