"The main purpose of this project is to develop, implement and evaluate a guided-inquiry curriculum using the Physics by Inquiry (PbI) instructional approach. We wanted to investigate the effect of the inquiry-based curriculum and instruction on students' conceptual development and attitude towards the learning of Science. The research questions guiding the project were: 1) What are the favourable modifications in adapting the PbI instructional approach for improving the learning of lower secondary Science in Singapore? 2) What are the differences in the learning outcomes when students learn Physics through the inquiry approach as compared to the standard classroom practices? 3) What are the perceptions of teachers and students on teaching and learning Physics by inquiry in the classroom?" -- p. 2.