The purpose of the study was to determine the relationship between instructional leadership of teachers and academic achievement of students in Christian elementary schools in Davao City. The study made use of the descriptive-correlation design. One hundred forty-one respondents who finished their grade 4 and grade 5 were purposely selected from four Christian elementary schools. Mean, Pearson product moment correlation and multiple regression were used in the analysis of data. Findings showed that the extent of manifestation of instructional leadership was high, which means that teachers’ instructional leadership was oftentimes manifested. The level of academic achievement of students was very satisfactory which means that students had very satisfactory intellectual abilities particularly in Mathematics. The instructional leadership of teachers in terms of communicating and setting of goals, feedbacking learners and promoting skills development had significant positive relationship with the academic achievement of students. An improved instructional leadership would also likely increase the academic achievement of students. Communicating and setting of goals had significant influence on academic achievement of students; however, feedbacking learners and promoting skills development did not predict academic achievement.