Return to Article Details PENERAPAN MODEL PROBLEM SOLVING LEARNING UNTUK MENINGKATKAN HASIL BELAJAR KOGNITIF SISWA KELAS XI PADA MATERI KONFLIK SOSIAL DI SALAH SATU SMA DI SURABAYA [THE IMPLEMENTATION OF PROBLEM-SOLVING LEARNING MODELS TO IMPROVE STUDENTS COGNITIVE ACHIEVEMENT ON CONFLICT OF GRADE XI SENIOR HIGH SCHOOL IN ONE OF THE HIGH SCHOOL IN SURABAYA] Download Download PDF