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Savera Oping S, Juliana Margareta Sumilat, Kartini Ester. Development of A Diagnostic Assessment Instrument For Mathematics Learning For Grade II Elementary School. IJERSC [Internet]. 2026 Nov. 2 [cited 2026 Nov. 4];7(5):882-90. Available from: https://ijersc.org/index.php/go/article/view/1134