<p>Penelitian ini bertujuan untuk meningkatkan hasil belajar matematika menggunakan model <em>problem based learning</em> pada siswa kelas V SD N Godog 02 Kabupaten Sukoharjo tahun pelajaran 2020/2021. Penelitian ini merupakan Penelitian Tindakan Kelas (PTK). Penelitian dilaksanakan dalam dua siklus, dengan tiap siklus terdiri atas perencanaan, pelaksanaan tindakan, observasi, dan refleksi. Teknik pengumpulan data yang digunakan dalam penelitian ini adalah observasi dan catatan lapangan. Sedangkan validitas data menggunakan teknik triangulasi data. Analisis data menggunakan teknik analisis kuantitatif dan diskribsi kualitatif. Hasil penelitian menunjukkan bahwa Hasil penelitian menunjukkan bahwa melalui penerapan model <em>problem based learning</em> dapat meningkatkan hasil belajar siswa dari ke siklus I dengan persentase kelulusan sebesar 63% dan pada siklus 2 mengalami kenaikan persentase kelulusan menjadi 87%. Berdasarkan analisis dan pembahasan hasil penelitian dapat disimpulkan bahwa model <em>problem based learning </em>dapat meningkatkan hasil belajar matematika siswa kelas V SD N Godog 02 Kabupaten Sukoharjo. <strong></strong></p>
Cassava are one of the staple foods in place of rice. However, today almost no one consumes cassava as a staple food substitute for rice. Indonesia is ranked third as the world's largest producer of cassava. Therefore, to maintain the value of yam production, the author will look for linear regression models as well as the best models with factors that are harvest area and productivity. Productivity is defined as the result of a comparison between the area of harvest and production. To search for regression models use multiple linear regression methods, while the best models use stepwise methods. Based on existing data, the best model is obtained with negative interception and influenced by productivity and the extent of the yam harvest.
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