Atika Febri Melinda, Anil Hakim Syofra, Desniarti Desniarti and Mapilindo Mapilindo 2026. 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. International Journal Of Humanities Education and Social Sciences. 6, 2 (Oct. 2026). DOI:https://doi.org/10.55227/ijhess.v6i2.2585.