Developing Student Learning Activities on the Environmental Themes of Our Friends Using a Combination of the Problem Solving, S.A.V.I and CRH Models in Class Students V SDN Melayu 2 Banjarmasin Journal title: International Journal of Social Science And Human Research Authors: Fathul Jannah, Muhammad Zefri, Reja Fahlevi Subject(s): Economics, Humanities, Law, Social Sciences, Literature, Sociology of Education, Criminology, Public Administration