Turnitin: Development of Student Worksheets on Ethnomathematics-Based Trigonometry through Project-Based Learning Models

One of Indonesia Curriculum 2013 learning principles is learning that prioritizes culture and the empowerment of students. The culture of certain societies contains a mathematical concept known as ethnomathematics. One of the many mathematical materials found in ethnomathematics is trigonometry. However, in reality, students have difficulty mastery of trigonometry material. So far, ethnomathematics-based learning tools in Aceh traditional houses as an application of trigonometry are not yet available. Therefore, it is necessary to develop ethnomathematics-based learning tools. This study aims to develop an ethnomathematics-based trigonometry project worksheet through the Project-Based Learning model that met the valid criteria. This research refers to the Plomp development model, which consists of preliminary research and a prototyping stage. This study's instruments were needs analysis sheets, validation sheets, observation sheets, and response questionnaires. The results showed that the developed Project Worksheet met the valid criteria because all validators stated that the project worksheet was fit for use.