Paper—Development Of Guided Discovery Based Electronic Module For Chemical Lessons In Redox… Development Of Guided Discovery Based Electronic Module For Chemical Lessons In Redox Reaction Materials https://doi.org/10.3991/ijim.v15i07.21559 Dewi Handayani ( * ) , Elvinawati, Isnaeni University of Bengkulu, Bengkulu, Indonesia d.handayani@unib.ac.id Muzanip Alperi Institution of Education Quality Assurance, Bengkulu, Indonesia Abstract—This research is the development of guided disvovery based elec- tronic module that aims to knowing the eligibility level of e-modules and stu- dent responses to guided discovery based electronic modules in redox reaction material. This electronic module uses the ADDIE development model. Research was conducted at one of the high schools in Bengkulu with the subject 9 stu- dents of X MIPA A Students for small scale trials and 30 students of X MIPA D Students for large scale trials. From the results of the research obtained (1) the percentage of feasibility of e-modules on the material aspect is 86,315% while from the media aspect is 91.425% so that based on the results of validation by the E-module validator is declared very valid, (2) based on the test results of the small-scale student response percentage of 75.97 % with interesting category, while for large-scale trials of 84.48% with a very interesting category. From the results percentage, it can be concluded that e-module is suitable for use in learn- ing. Electronic modul based on guided discovery is an effective tool to help students in learning redox reaction subject. E-modul can be accessed by smartphone or laptop. With this e-modul, students can access the study material from everywhere without any time limitation. Keywords—Electronic Modules, Guided Discovery, Redox Reaction Materi- als. 1 Introduction Books are a learning support tool for students to dig up informations, concepts, and gain knowledge as well as chemistry textbooks. In learning activities, chemistry text- books are one of the learning resources that are often used by teachers and high school students to support the learning process. Chemistry textbooks contain infor- mation about subject matters, examples and practice questions, as well as supporting pictures that are useful for students in understanding learning concepts. 94 http://www.i-jim.org