The purpose of this research was to determine the effectiveness the use of audio-visual media in teaching procedural texts for seventh grade students of Negeri 3 Kualuh Selatan Junior High School, North Labuhanbatu Regency. This research is an experimental research using a pretest and posttest. The population of this research is students of Negeri 3 Kualuh Selatan Junior High School which consists of 7 classes with a population of 250 students. From this number, a sample of 20% was determined, namely 50 students, then the sample was divided into two control groups and an experimental group, totaled 25 students in random sampling technique. The instrument or data collection tool used to determine learning outcomes is an essay test. From the results of data analysis, it was found that audio-visual media was more effective than conventional media. In this case, it is obtained t-count 6.81 then consulted with t-table at level 0.05 (5%) is 0.127 with dk = (N + N) -2 = 48. Because the t-count obtained is greater than the accepted t-table. This proves that learning procedural texts using audio-visual media is more effective than conventional media.
Penelitian ini bertujuan untuk meningkatkan kinerja guru Matematika dalam pembelajaran melalui supervisi kolaboratif. Penelitian ini berbentuk Penelitian Tindakan Sekolah yang dilakukan dalam dua siklus. Setiap siklus dilaksanakan dengan empat langkah, yakni perencanaan, tindakan, pengamatan, dan refleksi. Tindakan dilakukan dua pertemuan persiklus. Setiap pertemuan dilakukan tahapan supervisi kolaboratif yaitu pra-observasi, observasi pembelajaran, pasca-observasi, analisis data, pemberian umpan balik, dan pemberian tindak lanjut. Data penelitian berupa hasil pengamatan di lapangan dan dokumentasi. Instrumen pengumpulan data adalah pedoman observasi dan dokumentasi. Analisis data dilakukan dengan teknik kualitatif dan kuantitatif. Hasil penelitian setiap siklus menunjukkan adanya peningkatan kinerja guru Matematika dalam pembelajaran. Peningkatannya dapat dilihat dari skor rata-rata kinerja siklus I dan siklus II. Skor rata-rata kinerja guru sebesar 70,71 pada siklus I dan pada siklus II mencapai 88,89. Dengan demikian, dapat disimpulkan, bahwa supervisi kolaboratif dapat meningkatkan kinerja guru Matematika dalam pembelajaran di SMP Negeri 1 Merawang.
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