PENGARUH REMEDIAL PEMBELAJARAN DAN BIMBINGAN ORANG TUA SISWA KELAS I TERHADAP HASIL BELAJAR MATEMATIKA (Penelitian Ex Post Facto di SD Negeri 01 Jakarta Pusat) THE EFFECT OFREMEDIAL LEARNINGANDPARENTSGUIDANCE ON LEARNING OUTCOMESOFMATHEMATICS (Ex Post Facto Research in 01 Elementary School State Centre Jakarta) SITI SYAHRAENI ABSTRACT The objective of this research was to understand ef…