Development and Validation of Predict, Discuss, Explain, Observe, Discuss and Explain-Based Module in Selected Topics in Pre-Calculus

This study aimed to develop and validate a PDEODE-based module in selected topics in Pre-calculus. This was initiated to enhance the poor performance of learners who are taking the STEM strand, particularly in STI College Global City. The developmental mixed method was utilized in this study. To gain a deeper understanding of the research problem, a sequential exploratory design was used. In the qualitative part of the study, the needs analysis was utilized in determining the selected topics in precalculus. The ADDIE Model was employed in the development of the module. The module lesson contained the following parts: learning objectives and trivia, the pre-test, the predict phase, the discuss phase, the explain phase, the observe phase, the discuss phase, the explain phase, and the post-test. In the quantitative part, the expertsin the fieldof mathematics andresearch well as the mathematics teachers of STI College Global City, evaluated the module in terms of the suitability of content and objectives, instructional design, layout and format, and approach and level of difficulty. Results of the study showed that all the teachers strongly agreed that the developed PDEODE-based module in selected topics in Pre-calculus met all the criteria found in each parameter on the validation tool. In addition, it was found that the mathematics performance of the students was enhanced and using the paired t-test with a 0.05 level of significance it is statistically proven that there is a significant difference in the scores of the students under the trial phase of the PDEODE- based module in selected topics in Pre-calculus. Therefore, it was concluded that the developed module is effective in enhancing the mathematical performance of the learners and teaching the pre-calculus subject.