This study involved examining the psychometric properties of the Tripartite Occupational Well-Being Scale (TOWBS) among a sample of 502 Australian teachers. The TOWBS (12 items) comprises three factors of subjective vitality, behavioral engagement, and professional growth. The TOWBS -- Short (3 items) assesses a broad factor of occupational well-being. Results confirmed the reliability, factor structure, and longitudinal measurement invariance of the scale scores for both scales. In addition, the two forms of the scale functioned similarly across different teacher characteristics, and the well-being factors were demonstrated to be associated with four external correlates in plausible ways (workplace buoyancy, psychological detachment, somatic burden, emotional exhaustion). Combined, findings offer support for the scale as an assessment of teacher well-being. Implications for research and practice are discussed.