Integrating Pandanwangi ethnomathematics into E-worksheets to support numeracy in online mathematics learning

Online mathematics learning requires digital resources that are not only accessible but also capable of connecting abstract mathematical concepts with meaningful real-life contexts. However, culturally contextualized digital materials for supporting numeracy remain limited, particularly for proportion concepts that students often find difficult to understand. This study developed an ethnomathematics-based e-worksheet integrating the agricultural practices of Pandanwangi rice farmers in Cianjur as a contextual digital resource to support numeracy in online mathematics learning. Using a research and development approach, the study followed three stages of the Plomp model: preliminary investigation, prototyping, and assessment. Product evaluation involved two lecturers, one mathematics teacher, and ten seventh-grade students. Data were collected through expert validation sheets and practicality questionnaires and analyzed descriptively. The results showed that the e-worksheet was highly valid, with media design ratings ranging from 92% to 95% and learning material ratings from 92% to 93%. It was also highly practical according to the teacher (95%), while students reported a practicality rating of 76%, indicating acceptable usability from the learner perspective. By transforming Pandanwangi farming practices into digital, contextual proportion activities, the e-worksheet connects local ethnomathematical knowledge with numeracy-oriented tasks that can be accessed through online learning environments. These findings establish its validity and practicality as a culturally contextualized digital resource for supporting numeracy in online mathematics learning.