Previous research has shown that teachers' sense of efficacy is an important presage variable associated with student achievement. Stereotypes evolving from this research include both positive and negative correlations between teacher perception of effectiveness and teaching experience. This research examines the relationship between years of teaching experience and a sense of efficacy as measured by teacher perception of external control (luck, fate, chance, etc.) and internal control (behavior that does have an effect). A low positive correlation was found between perception of effectiveness and years of experience. Alternative explanations are given for the findings and the need for further research is indicated. (Author/CJ)