Recognizing and rewarding teaching faculty are increasingly important to medical schools and are often hampered by low perceived reliability and validity of measures of teaching ability. The purpose of this study was to cross-validate two independently generated measures of teaching from medical students and residents. A total of 2,318 medical student and 4,425 resident scores for single-item measures of teaching ability for 129 teaching faculty members of a department of internal medicine over a 6-year period were compared. Results showed that average teaching scores were higher for medical students than residents. Rank order of faculty were within 2 quintiles for the two groups for over 90% of faculty. Highly discordant evaluations were seen for only 8% of faculty. The authors conclude the general concordance of two independent measures of teaching ability adds evidence to the existing literature of the validity of single-item measures of teaching ability from two different types of learners.