Abstract
This study aims to determine the validity and practicality of RME teaching materials containing Higher Order Thinking Skills (HOTS) on straight line equations in class VIII SMP Negeri 1 Kotagajah. This type of research is development research that uses the 4-D development model, while the stages are Define, Design (Planning), Develop (Development), and Disseminate (Spread) but this stage is not used. The data collection instrument used was a questionnaire. The practicality test was carried out online. Validation of material experts was carried out by two validators, and the results obtained were 81.31% with very valid criteria. design expert validation was carried out by two validators, and the results obtained were 76.02% or were in the valid criteria. The small group trial was conducted by 7 students, and the results of the small group trial were 79.3% or were in practical criteria. Based on the validation process and the small group trial process, RME teaching materials containing Higher Order Thinking Skills (HOTS) on straight line equations material for class VIII SMP Negeri 1 Kotagajah are declared valid and practical.
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