Singh, K. P., and G. Viswanathappa. “A Study of Constructivist Approach on Learning Outcomes Among IXth Standard Students”. Educational Trend (A Journal of RIE, Ajmer - NCERT), vol. 2, no. 2, Mar. 2025, pp. 174-9, http://ejournals.ncert.gov.in/index.php/ET/article/view/3686.