Development of Blended Learning Based on Structured Inquiry Using LMS Moodle on the Material of Thermochemistry for Phase F Senior High School

Thermochemistry, being an abstract subject closely connected to concrete examples, is often perceived as challenging by students. This research aims to evaluate the validity and assess the practicality level of a blended learning approach, structured on inquiry-based methods and facilitated through LMS Moodle, specifically applied to thermochemical material for phase F high school students. This type of research is Educational Design Research (EDR) with the Plomp model. This research product was validated by 5 validators, including three chemistry lecturers at FMIPA UNP and two chemistry teachers at SMAN 1 Lubuk Alung. The research findings indicate that the validity data, assessed using the Aiken's V scale with a score of 0.92, fall into the valid category. The practicality evaluation conducted by the chemistry teacher at SMAN 1 Lubuk achieved a score of 89.3%, which is classified as highly practical. The practicality carried out by nine students of SMAN 1 Lubuk Alung received a score of 87.1% which was categorized as very practical. Based on the results of this research, the structured inquiry-based blended learning system using Moodle LMS on thermochemical material for the F phase of high school can be categorized as valid and very practical.