Teachers brief nonverbal behaviors in defined instructional situations can predict students evaluations.

Can a few seconds of high school teachersʹ nonverbal (NV) behavior predict studentsʹ ratings of these teachers (SRT)? Yes, but NV-SRT relations varied among various instructional situations. NV behaviors while administering the class and using the board were unrelated to SRT. Positive judgments of NV behavior while disciplining the class and interacting with students were positively related to SRT. NV behaviors in frontal teaching were negatively related to SRT. The most negative NV-SRT relations were found for teachersʹ differential NV behavior toward high- versus low-achieving students. Teacher differentiality and SRT have rarely been investigated in high school. The structure of SRT seems to differ between high school and college, and studentsʹ anger about teachersʹ differentiality strongly predicted their evaluations.