Research investigating science teaching efficacy was conducted in 1 Australian university. A sample of 314 elementary preservice teachers responded to the Science Teaching Efficacy Belief Instrument (STEBI; L. G. Enochs & I. M. Riggs, 1990), which assesses 2 teaching efficacy dimensions: Personal Science Teaching Efficacy Beliefs (PSTEB) and Science Teaching Outcome Expectancy (STOE). Confirmatory factor analysis substantiated this 2-factor structure. The use of this instrument revealed that the completion of 2 science teaching subjects within the preservice program had a significant effect on the PSTEB, but not the STOE. Similarly, the number of high school science subjects studied by these elementary preservice teachers had a significant effect on PSTEB, but not STOE. However, neither gender nor the particular high school science subjects studied by these elementary preservice teachers had a significant effect on either the PSTEB or the STOE.