Atika Febri Melinda, Anil Hakim Syofra, Desniarti Desniarti, Mapilindo Mapilindo. The Effect Of The Open Learning Model On Student’s Understanding Of Mathematical Concepts In The Topic Of Arithmetic Sequences And Series At State High School 1 Simpang Empat, 10th Grade, Using The Geogebra Application. IJHESS [Internet]. 2026 Oct. 29 [cited 2026 Oct. 29];6(2). Available from: https://ijhess.com/index.php/ijhess/article/view/2585