Ndirangu, Caroline Waruguru, Grace Mutitu Nyagah, and Gerald Ngugi Kimani. “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, no. 5 (May 30, 2017): 118–140. Accessed April 19, 2026. https://ijlter.net/index.php/ijlter/article/view/822.