PENGEMBANGAN MEDIA PEMBELAJARAN INTERAKTIF BERBASIS WEB PIZZA PECAHAN SI KOKI (PIANSIKOKI) DALAM MENINGKATKAN NUMBER SENSE SISWA KELAS II SEKOLAH DASAR

DEVELOPMENT OF WEB-BASED INTERACTIVE LEARNING MEDIA PIZZA PECAHAN SI KOKI (PIANSIKOKI) TO IMPROVE NUMBER SENSE OF SECOND GRADE ELEMENTARY SCHOOL STUDENTS

Penelitian pengembangan ini bertujuan menguji validitas, kepraktisan, dan efektivitas media interaktif berbasis web, Pizza Pecahan Si Koki (PIANSIKOKI), untuk meningkatkan number sense pecahan siswa kelas II SD dalam mengatasi kesulitan transisi pemahaman verbal pecahan ke simbolik matematika. Media PIANSIKOKI dikembangkan menggunakan adaptasi Model ADDIE dan berpusat pada Teori Representasi Bruner, di mana fitur manipulasi objek digital memfasilitasi transisi Enaktif-Ikonik menuju Simbolik. Data dikumpulkan melalui validasi ahli, angket respons, serta tes pre-test dan post-test. Hasil menunjukkan PIANSIKOKI mencapai kategori Sangat Valid (92,5% materi; 90% media) dan Sangat Praktis (99,27% respons siswa). Media terbukti Sangat Efektif dalam meningkatkan number sense (N-Gain 91,14%, kategori Tinggi). Dengan demikian, PIANSIKOKI disimpulkan sebagai inovasi pembelajaran digital yang teruji, valid, praktis, dan efektif meningkatkan number sense pecahan melalui fasilitasi transisi representasi visual-simbolik.

This developmental research aims to test the validity, practicality, and effectiveness of web-based interactive media, Pizza Pecahan Si Koki (PIANSIKOKI), to enhance second-grade elementary school students' fraction number sense by addressing difficulties in the transition from verbal understanding of fractions to mathematical symbolic representation. PIANSIKOKI media was developed using the ADDIE Model adaptation and centered on Bruner's Representation Theory, where the digital object manipulation feature facilitates the Enactive-Iconic to Symbolic transition. Data were collected through expert validation, response questionnaires, and pre-test and post-test scores. Results indicate PIANSIKOKI achieved the Highly Valid category (92.5% material; 90% media) and the Highly Practical category (99.27% student response). The media proved to be Highly Effective in enhancing number sense (N-Gain 91.14%, High category). Thus, PIANSIKOKI is concluded as a tested, valid, practical, and effective digital learning innovation for enhancing fraction number sense through the facilitation of visual-symbolic representation transition.