Penerapan Metode Drill Untuk Meningkatkan Hasil Belajar Kognitif Siswa Kelas IX Materi Statistika di Smp Kristen Rantepao [The Implementation of the Drill Method to Improve Cognitive Learning Outcomes of Grade 9 Students Studying Statistics at a Christian Junior High School in Rantepao] - Astuningtias, Kezia Irene (Universitas Pelita Harapan, 2017)