The objectives of this research are to apply the use of the cooperative learning of STAD type with Make A Match modification supported by the students' initial ability, learning motivation, learning interest, and learning activities on the accomplishment of their Economics learning completeness.This research used the classroom action research. It was conducted in two cycles at Nusantara Indah Senior Secondary School of Sintang, West Kalimantan. The subjects of the research were the students in

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... rade XE of the school. The data of the research were gathered through observation, test, questionnaire, and in-depth interview, and documentation. They were then descriptively analyzed by comparing the results of each cycle. The results of the research are as follows. Prior to the treatment, the percentage of the students who accomplish the Economics learning completeness is 13.15% with the score of their initial learning interest of 77.24 (low category), that of the learning motivation of 63.23 (low category), and that of the learning activities of 61.15 (low category). Following the treatment, the percentage of the students who accomplish the Economics learning completeness becomes 51.42% in Cycle I with the score of their initial learning interest of 93.31 (high category), that of the learning motivation of 70.51 (high category), and that of the learning activities of 67.85 (low category) and 91.42% in Cycle II with the score of their initial learning interest of 114.77 (high category), that of the learning motivation of 90.17 (high category), and that of the learning activities of 89.74 (high category). Based on the results of the research, a conclusion is drawn that there is an improvement in the students' final average score. Abstrak: Penelitian ini bertujuan untuk menerapkan model pembelajaran kooperatif tipe STAD bermodifikasi Make A Match dengan didukung kemampuan awal, motivasi, minat dan aktivitas belajar siswa terhadap pencapaian ketuntasan belajar ekonomi siswa. Penelitian ini merupakan penelitian tindakan kelas di SMA Nusantara Indah Sintang yang dilaksanakan dalam dua siklus. Subjek penelitian siswa kelas XE, data diperoleh melalui observasi, tes, angket, wawancara serta dokumentasi. Dianalisis secara deskriptif dengan membandingkan hasil dari setiap siklus.Hasil dari penelitian ini adalah adanya peningkatkan nilai akhir siswa yaitu pada awal pembelajaran, jumlah siswa yang tuntas pada pelajaran Ekonomi hanya 13,15% dengan skor angket minat belajar awal 77,24 kategori rendah, skor angket motivasi belajar 63,23 kategori rendah, dan skor angket aktivitas belajar 61,15 juga dengan kategori rendah. Kemudian, ketuntasan belajar siswa meningkat pada siklus I yaitu 51,42%. Diikuti dengan meningkat pula skor angket minat belajar menjadi 93,31 kategori tinggi, angket motivasi belajar 70,51 kategori tinggi dan skor angket aktivitas belajar yaitu 67,85 dengan