THE IMPACT OF MANIPULATIVE-BASED INSTRUCTION ON CONCEPTUAL UNDERSTANDING OF ARITHMETIC IN EARLY PRIMARY GRADES. Innovative Technologica: Methodical Research Journal, [S. l.], v. 6, n. 12, p. 37–43, 2025. DOI: 10.17605/. Disponível em: https://it.academiascience.org/index.php/it/article/view/718. Acesso em: 31 jan. 2026.