ZULHENDRIK; AMBIYAR; ISHAK AZIZ. THE ABILITY TO UNDERSTAND MATHEMATICAL CONCEPT OF STUDENTS OF CLASS VII SMPN 3 PEKANBARU THROUGH COOPERATIVE LEARNING MODEL TYPE OF GROUP INVESTIGATION. International Journal Of Humanities Education and Social Sciences, [S. l.], v. 1, n. 2, 2021. DOI: 10.55227/ijhess.v1i2.45. Disponível em: https://ijhess.com/index.php/ijhess/article/view/45. Acesso em: 9 oct. 2025.