“PENGARUH MODEL PEMBELAJARAN DAN MOTIVASI BELAJAR TERHADAP KEMAMPUAN PEMAHAMAN KONSEP MATEMATIKA (EKSPERIMEN PADA SISWA SMP SWASTA DI KABUPATEN LEBAK): THE INFLUENCE LEARNING MODEL AND STUDENT’S MOTIVATION TOWARD THE COMPREHENSIBLE OF MATHEMATICS CONCEPT” (2021) Abacus: Academic Journal of Mathematics Learning and Education, 2(01), pp. 21–37. doi:10.59605/abacus.v2i01.158.