Research on self-fulfilling prophecies in the classroom found that ____.

A) the effects are quite large-teacher expectations explain student achievement
B) the effects are quite small-teacher expectations are often accurate
C) teacher expectations are quite inaccurate
D) teachers promote the self-defeating prophecy

The effects of self-fulfilling prophecies in the classroom are generally found to be quite small because teacher expectations often accurately reflect students' abilities and performance levels. This means that while teacher expectations can influence student achievement, the impact is not as significant as other factors, and these expectations are frequently based on observable student behaviors and performance.