Consistent with research conducted by George Spindler 60 years ago, teachers continue to perceive groups of students, typically students that differ from the teacher, as less capable of accomplishing meaningful tasks, belonging and contributing to social groups, and engaging actively in challenging work. The bias is especially great for students who struggle to perform academically. The article reflects on the importance of teacher effects on students' developing sense of self, especially in our accountability age. (Contains 1 note.)