Ünal ZE, Ala AM, Kartal G, Özel S, Geary DC. Ninth-Grade Students’ Conceptual Understanding of the Number Line. J Numer Cogn [Internet]. 2024Jul.5 [cited 2026May4];10:Article e12501. Available from: https://jnc.psychopen.eu/index.php/jnc/article/view/12501