Hakop Walangadi , Elmia Umar , Nurain Saleh. (2022). IMPROVING LEARNING OUTCOMES USING IPS LEARNING PROBLEM-BASED LEARNING APPROACH IN CLASS IV STUDENTS OF SDN 7 TELAGA BIRU GORONTALO DISTRICT. British Journal of Global Ecology and Sustainable Development, 11, 28–40. Retrieved from http://journalzone.org/index.php/bjgesd/article/view/172