ABSTRAK Tujuan penelitian ini adalah (1) mengetahui kelayakan pengembangan media puzzle bangun datar tak beraturan materi menghitung luas bangun datar tak beraturan di kelas III UPTD SD Negeri Kraton 1 Bangkalan (2) mengetahui keefektifan pengembangan media puzzle bangun datar tak beraturan materi menghitung luas bangun datar tak beraturan di kelas III UPTD SD Negeri Kraton 1 Bangkalan (3) mengetahui kemenarikan pengembangan media puzzle bangun datar tak beraturan materi menghitung luas bangun datar tak beraturan di kelas III UPTD SD Negeri Kraton 1 Bangkalan. Penelitian ini menggunakan model pengembangan Borg & Gall yang dimodifikasi oleh Sugiyono. Berdasarkan hasil penelitian yang dilakukan, diperoleh hasil bahwa persentase kelayakan media puzzle bangun datar tak beraturan menurut ahli media pembelajaran sebesar 92% (sangat valid), ahli desain pembelajaran sebesar 78,67% (valid), dan rata-rata ahli materi pembelajaran sebesar 82% (valid). Keefektifan media puzzle bangun datar tak beraturan diukur dari persentase hasil pada uji coba pemakaian meliputi persentase hasil observasi aktivitas guru sebesar 92% (sangat aktif), persentase hasil observasi aktivitas siswa sebesar 88,88% (sangat aktif), dan persentase ketuntasan belajar klasikal sebesar 88,46% (tuntas). Kemenarikan media puzzle bangun datar tak beraturan diukur dari persentase hasil angket respon siswa pada uji coba pemakaian sebesar 96,02% (sangat menarik). Hasil tersebut menunjukkan bahwa media puzzle bangun datar tak beraturan sangat layak, sangat efektif, dan sangat menarik diguunakan pada mata pelajaran matematika materi menghitung luas bangun datar tak beraturan menggunakan petak satuan. Kata kunci: Pengembangan, Media Pembelajaran, Media Puzzle, Bangun Datar Tak Beraturan.

ABSTRACT The purpose of this research was (1) knowing the feasibilty of developing irragular two dimentional object puzzle media subject calculate area of irregular two dimentional object at third grade UPTD SD Negeri Kraton 1 Bangkalan (2) knowing the effectivenessof developing irregular two dimentional object puzzle media subject calculate area of irregular two dimentional object at third grade UPTD SD Negeri Kraton 1 Bangkalan(3) knowing the attractiveness of developing irregular two dimentional object puzzle media subject calculate area of irregular two dimentional object at third grade UPTD SD Negeri Kraton 1 Bangkalan. This research used a development model of Borg and Gall modified by Sugiyono.Based on the results of the research conducted, it was obtained the results that the percentage of the feasibility of irregular two dimentional object puzzle media according to expert learning media was 92% (very valid), learning design experts were 78.67% (valid), and the average expert learning material was 82 % (valid). The effectiveness of irregular two dimentional object puzzle media measured from the percentage of results in the use trial includes the percentage of teacher activity observation results of 92% (very active), the percentage of student activity observations amounted to 88.88% (very active), and the percentage of classical learning completeness by 88.46% (complete). The withdrawal of irregular two dimentional object puzzle media measured from the percentage of the results of the questionnaire responses of students in the usage trial was 96.02% (very interesting). These results indicate that the irregular two dimentional object puzzle media is very feasible, very effective, and very interesting to use on the math subject to calculate the area of irregular two dimentional object using a unit plot. Keyword:Developing, Educating Media, Puzzle Media, Irregular two dimentional object

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