This study aims to develop EX-MysteryChem teaching module and to investigate the educators’ perception on the suitability of the EX-MysteryChem teaching module for teaching and learning for the learning area of Polymer Chemistry. This study is a developmental research design (DRD) with qualitative approach. The ADDIE model is used as the instructional design model in developing the EX-MysteryChem teaching module. The instruments used in this study are content validity evaluation form and interview protocol. Two Chemistry lecturers have been appointed to validate the content validity of EX-MysteryChem teaching module and two secondary chemistry teachers have been selected as respondents for this study. The data for the content validity was analyzed using Average Congruent Percentage (ACP), while the interview protocol was analyzed using the thematic analysis technique. The result show that the overall content validity is 96.2% value of the teaching module, the findings from.....

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