THE EFFECTIVENESS OF E-BOOKLET COORDINATION SYSTEM ON LEARNING OUTCOMES OF PHASE F STUDENTS AT SMAN 13 PADANG: EFEKTIVITAS E-BOOKLET SISTEM KOORDINASI TERHADAP HASIL BELAJAR PESERTA DIDIK FASE F DI SMAN 13 PADANG. Bio-lectura. 2024;11(2):269-281. doi:10.31849/bl.v11i2.21604