We report findings of two studies, one conducted in a rural school district (N = 982) and a second conducted in an urban district (N = 1,079), offering additional evidence of the reliability and validity of a revised instrument, the Student Risk Screening Scale-Internalizing and Externalizing (SRSS-IE), to accurately detect internalizing and externalizing behaviors. The SRSS-IE was modified to include seven additional items characteristic of internalizing behaviors. Items were developed based on information gleaned from current measures and the existing knowledge base as well as teaching experience with students with emotional or behavioral disorders. The original 7 items developed by Drummond (1994) were retained, resulting in a total of 14 items (SRSS-IE14). Scoring procedures remained the same as with the SRSS, with elementary teachers evaluating each student on each item using a 4-point Likert-type scale. In both studies, we examined item-level data, internal consistency, and factor structure. Results supported retention of five of the seven additional items, yielding the SRSS-IE12. In the second study, we explored and established convergent validity of the SRSS-IE12 as well as the two subscales (SRSS-E7, seven original externalizing items, and SRSS-I5, five retained internalizing items) with the Systematic Screening for Behavior Disorders (H. M. Walker & Severson, 1992). Limitations and future directions are offered, including how to use information in designing Tier 2 and Tier 3 intervention supports. (Contains 10 tables.)