<![CDATA[ABSTRACT Plastic waste can be incorporated into learning experiences when students are directly involved in transforming it into useful products. This study aimed to describe changes in the creativity and environmental concern of fifth-grade students after participating in project-based learning through the production of ecobricks, while also describing students’ achievement in carrying out the activities through a performance test. The study involved 57 fifth-grade students at SD Negeri 109 Palembang, consisting of 29 students from class V.D and 28 students from class V.E. The learning activities were conducted over six meetings and included introducing the issue of plastic waste, collecting materials, producing ecobricks, and completing the products. Data were collected through questionnaires, observations, documentation, and performance tests. Changes in creativity and environmental concern were examined by comparing the pretest and posttest scores of the two groups, while achievement in carrying out the activities was assessed based on the mean performance-test scores. Creativity changed in both groups, with an average increase of 1.93 points in the experimental class and 3.00 points in the control class. Environmental concern also changed, while the experimental class obtained a mean performance-test score of 92.45, categorized as very good, and the control class obtained 77.18, categorized as good. These findings illustrate the potential of project-based learning through ecobrick production as a contextual learning experience that connects product creation activities with environmental issues. ABSTRAK Sampah plastik dapat dihadirkan sebagai bagian dari pengalaman belajar ketika siswa terlibat langsung dalam proses pemanfaatannya menjadi produk. Penelitian ini bertujuan mendeskripsikan perubahan kreativitas dan kepedulian lingkungan siswa kelas V setelah mengikuti pembelajaran berbasis proyek melalui pembuatan ecobrick, sekaligus menggambarkan capaian siswa dalam pelaksanaan kegiatan melalui tes unjuk kerja. Penelitian melibatkan 57 siswa kelas V SD Negeri 109 Palembang, dengan 29 siswa pada kelas V.D dan 28 siswa pada kelas V.E. Kegiatan pembelajaran berlangsung selama enam pertemuan dan mencakup pengenalan persoalan sampah, pengumpulan bahan, pembuatan ecobrick, serta penyelesaian produk. Informasi penelitian dihimpun melalui kuesioner, observasi, dokumentasi, dan tes unjuk kerja. Perubahan kreativitas dan kepedulian lingkungan diamati melalui perbandingan skor pretest dan posttest pada kedua kelompok, sedangkan capaian pelaksanaan kegiatan dilihat dari rata-rata tes unjuk kerja. Kreativitas mengalami perubahan pada kedua kelompok, dengan peningkatan rata-rata 1,93 poin pada kelas eksperimen dan 3,00 poin pada kelas kontrol. Kepedulian lingkungan juga mengalami perubahan, sedangkan tes unjuk kerja kelas eksperimen mencapai rata-rata 92,45 dengan kategori sangat baik dan kelas kontrol 77,18 dengan kategori baik. Temuan ini menggambarkan potensi pembelajaran berbasis proyek melalui ecobrick sebagai pengalaman kontekstual yang menghubungkan aktivitas menghasilkan karya dengan persoalan lingkungan.]]>
