Ndirangu, C. W. ., Nyagah, G. M. . and Kimani, G. N. . (2017) “The Level of Implementation of ASEI/PDSI Classroom Practices in Science Subjects: A Case of SMASSE Project, Kenya”, International Journal of Learning, Teaching and Educational Research, 16(5), pp. 118–140. Available at: https://ijlter.net/index.php/ijlter/article/view/822 (Accessed: 19 April 2026).