Group Investigation Method: Alternatif Peningkatan Sikap Matematika Siswa

Penelitian ini merupakan penelitian tindakan kelas (class action research). Penelitiantindakan dilakukan untuk meningkatkan prestasi belajar dan sikap siswa terhadappembelajaran matematika dengan menggunakan model pembelajaran kooperatif tipe GroupInvestigation. Masalah yang ingin dipecahkan dalam penelitian ini adalah bagaimana polapenerapan model pembelajaran kooperatif tipe Group Investigation yang dapat meningkatkanprestasi belajar dan sikap siswa terhadap matematika pada kelas VII SMP Sunan AverroesYogyakarta.Rancangan dalam penelitian ini mengacu pada model spiral atau siklus menurutKemmis & Mc Taggart. Subjek dalam penelitian ini adalah siswa kelas VII SMP SunanAverroes Yogyakarta. Jenis data yang digunakan dalam penelitian ini adalah data kualitatif yaitudata prestasi belajar siswa dan sikap siswa terhadap matematika. Data prestasi belajar diperolehdengan menggunakan post test pada akhir setiap siklus yang akan dibandingkan dengan KKMsecara klasikal. Adapun data untuk sikap siswa diperoleh dari angket siswa pada akhir siklus.Sesuai dengan petunjuk teknik penilaian kelas dapat dikatakan tuntas secara klasikal terhadapprestasi belajar yang disajikan bila ketuntasan klasikal mencapai 75 %. Pelaksanaan modelpembelajaran kooperatif tipe group investigation dikatakan berhasil apabila pada akhir setiapsiklus terdapat perbedaan peningkatan keaktifan siswa dalam proses pembelajaran yangterlihat pada aspek prestasi belajar matematika siswa dan sikap siswa dalam pembelajaranmatematika.Berdasarkan hasil penelitian yang telah dilakukan pada siswa SMP Sunan Averrouspada materi pokok Aritmatika Sosial, dapat disimpulkan bahwa model pembelajaran tipe GIdalam meningkatkan prestasi belajar dan sikap siswa. Peningkatan prestasi belajar dan sikapsiswa cukup signifikan. Pada siklus I ketuntasan klasikal prestasi belajar sebesar 33,33% danpada siklus II sebesar 75% sedangkan pada sikap siswa siklus I siswa dengan kategori sikaptinggi sebesar 50% dan kategori sangat tinggi sebesar 50% sedangkan sikap siswa pada siklusII dengan kategori sikap tinggi sebesar 45% dan kategori sangat tinggi sebesar 55%.Kata kunci: Group Investigation, Sikap Belajar, Matematik

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