The present study aimed to explore the relation between students' oral reading efficacy, reading comprehension, and academic performance on a nationwide high school placement exam (TEOG). The students were selected from a public middle school. The students' oral reading efficacy, comprehension, and TEOG achievement scores were obtained to figure out the relations between them. The students' TEOG results were obtained from the school administration. The findings revealed that there were statistically significant relations between oral reading efficacy, reading comprehension and TEOG achievements. Particularly, students' reading comprehension and accuracy skills together explained 57% of variance in overall TEOG achievements.