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This research aims to produce learning media for the Ethnomathematics Student Worksheet on Traditional Market Snacks in Pontianak City on the flat-sided building material that reaches the level of validity, practicality, and effectiveness. This study uses a 4D design model, which is modified into 3D, namely define (definition), design (design), development (development), without using the fourth stage, namely disseminate, because this refers to the initial goal of this research is to develop valid, practical and effective media contained in the third step of the development of this model, namely development. The subjects in this study were students of class VIII SMP Suster Pontianak with a total of 20 students. The instruments used in this study were validation sheets, questionnaires, and test questions. Based on the results of the first study, the validation of the Ethnomathematics Student Worksheet with an average value of 84,76% from expert activities was very valid with a very good category. The second is the value of practicality, seen from the value of the questionnaire filled in by the teacher, the percentage is 97% with very practical criteria. to see the effectiveness of the ethnomathematics-based student worksheet learning media compared to the Likert scale index, with a percentage of 81.11% in the very effective criteria.    

Metode penelitian yang akan digunakan dalam penelitian ini adalah metode Penelitian dan Pengembangan (RnD). Rancangan penelitian dan pengembangan dalam penelitian ini menggunakan model Thiagarajan yang juga dikenal dengan model 4D yang dimodifikasi menjadi 3D yaitu define (pendefinisian), design (perancangan), dan development (pengembangan). Alat pengumpul data yang digunakan berupa tes kemampuan pemahaman matematis, lembar validasi, dan angket respon guru. Subjek uji coba produk dalam penelitian ini adalah peserta didik kelas VIII A MTs Negeri 2 Sambas yang berjumlah 28 orang. Tujuan dari penelitian ini adalah untuk mengembangkan E-LKPD berbasis Etnomatematika dalam Permainan Senaporan dan Selimban berbantuan Live Worksheet terhadap Kemampuan Pemahaman Matematis pada Materi Peluang di Kelas VIII MTs Negeri 2 Sambas yang dilihat dari tingkat kevalidan, keefektivan dan kepraktisan. Hasil dari rata-rata persentase validasi yang diperoleh adalah 94,44% dengan kriteria sangat valid. Untuk hasil dari angket respon guru memproleh persentase nilai sebesar 96,47% dengan kriteria sangat praktis, maka E-LKPD yang dikembangkan telah dapat dimanfaatkan sebagai bahan ajar dengan sedikit revisi. Ketuntasn belajar klasikal dapat tercapai jika memenuhi 75% dengan nilai peserta didik harus lebih besar atau sama dengan 75. Hasil dari tes peserta didik memperoleh persentase nilai 85,72% dengan kriteria sangat efektif. Dari hasil tersebut dapat disimpulkan bahwa E-LKPD yang dikembangkan layak untuk digunakan.

This study aims to: determine the quality and readability of acid-base worksheets based on discovery learning. The research method used is R&D (Research and Development) with research stages adapted to the Borg and Gall theory modified by Sugiyono. The research stages carried out were data collection, product design, design validation, design revision, limited trial, and product revision. The quality of the worksheet student developed was validated by 3 material experts. The readability test of the LKPD developed was seen from the responses of  9 students. The results showed that the average validator assessment was 92.11% (very valid category). The average assessment of the readability test by students is 3.46 with a good category (limited scale trial). Based on the validation of experts and student responses, the LKPD developed was valid and suitable to be used as a learning tool in acids and bases