“Question Level Analysis based on the Observed Taxonomy of Learning Outcome Structures in the 2013 Elementary School Mathematics Curriculum Book: Analisis Level Pertanyaan berdasarkan Taksonomi Struktur Hasil Belajar yang Diamati pada Buku Matematika Kurikulum 2013 Sekolah Dasar” (2023) Indonesian Journal of Education Methods Development, 18(1), p. 10.21070/ijemd.v21i.718. doi:10.21070/ijemd.v21i.718.