Science and Education Publishing American Journal of Educational Research 2327-6150 5 1 2017 2 4 The Influence of Project-based Learning Strategy and Self-regulated Learning on Academic Procrastination of Junior High School Students' Mathematics Learning 88 96 EN Dahlia Novarianing Asri State University of Malang, Indonesia, IKIP PGRI, Madiun, Indonesia Punaji Setyosari Imanuel Hitipeuw Tutut Chusniyah EDUCATION20175114 10.12691/education-5-1-14 2016 10 10 2016 11 25 2017 2 2 The objective of this study is to obtain conclusions concerning different levels of junior high school students' academic procrastination in learning mathematics by applying a project-based learning strategy and a conventional learning strategy. The different levels of junior high school students' academic procrastination depend on high or low self-regulated learning and the interaction effects of project-based learning strategies and self-regulated learning in accordance with academic procrastination of junior high school students in learning mathematics. Experimental research design was used in this quasi-experimental research, along with its cluster random sampling technique. The data collection instrument was self-regulated learning and academic procrastination scales. The data analysis techniques to test hypotheses was a two-way Anava track. The result shows (1) differences in the levels of academic procrastination in learning mathematics for junior high school students who got the project-based learning strategy and conventional learning strategy, (2) differences in the levels of academic procrastination for junior high school students who had low self-regulated learning, and (3) an interaction effect of project-based learning and self-regulated learning strategies on academic procrastination of junior high school students in learning mathematics.