Manyilizu, Elikana Elisha, et al. , translators. “Effectiveness of the Concrete-Representational-Abstract (CRA) Approach in Enhancing Addition and Subtraction Skills Among Early Grade Learners in Ubungo Municipality, Tanzania”. International Journal of Education Foundations, vol. 3, no. 2, Mar. 2026, pp. 383-90, https://doi.org/10.33687/ijef.003.02.00174.