Abstrak: Penelitian ini bertujuan untuk meningkatkan aktivitas dan hasil belajar siswa SMPN 1 Lingsar kelas VII-1 pada materi segi empat melalui penerapan model pembelajaran Kooperatif tipe Snowball Thowing. Penelitian ini merupakan penelitian tindakan kelas yang dilaksnakaan dalam 2 siklus. Hasil penelitian menunjukkan bahwa penerapan model pembelajaran tersebut dapat memperbaiki aktivitas dan hasil belajar siswa. Hal ini ditunjukkan oleh skor aktivitas siswa tergolong tinggi pada siklus I dan sangat tinggi pada siklus II. Sedangkan skor rata-rata hasil evaluasi belajar siswa mengalami peningkatan pada tiap siklus yaitu pada siklus I rata-rata skor hasil evaluasi belajar 58,2 dengan ketuntasan klasikal 50% dan pada siklus II skor rata-rata hasil evaluasi belajarnya mencapai 85,74 dengan ketuntasan klasikal 89%. Capaian tersebut menunjukkan bahwa penerapan Model Pembelajaran Kooperatif tipe Snowball Throwing pada pembelajaran segiempat dapat meningkatkan aktivitas dan prestasi belajar siswa SMP Negeri 1 Lingsar kelas VII-1 tahun pelajaran 2012/2013. Kata kunci:Kooperatif tipe snow ball throwing, aktivitas belajar, hasil belajar. Abstract:This research aims to improve the activity and student learning outcomes SMPN 1 Lingsar class VII-1 on the rectangular material through the implementation of cooperative learning model type thowing Snowball. This research is a classroom action research conducted in two cycles. The results showed that the application of the learning model can improve the activity and student learning outcomes. This is demonstrated by the student activity score relatively high on the first cycle and very high in the second cycle. While the average score on the evaluation of student learning has increased in each cycle, namely in the first cycle an average score of 58.2 on the evaluation study with classical completeness 50% and the second cycle the average score on the evaluation study reached 85.74 with classical completeness 89%. These achievements show that the application of cooperative learning model type Snowball Throwing on the rectangular material can increase the activity of learning and student achievement SMP Negeri 1 Lingsar class VII-1 of the school year 2012/2013.
This study aims to describe the errors and the causes of errors in solving mathematics word context problem in the topic of absolute value. Based on Newman’s Error Analysis terms of student’s lerning styles. Error analysis must continue to be carried out so that teachers know the types, causes, and solutions to overcome student errors. This type of research is descriptive qualitative.The research subjects of class X MIA 1 SMAN 1 Janapria academic year 2020/2021 were selected by purposive sampling. To deepen the research results, 2 students were selected from each type of learning style. Data collection techniques used are learning style questionnaire, diagnostic tests, and interviews. Data analysis technique used data reduction, data presentation, and conclusion. Based on the results of the data is (i) students with visual learning style and audits mostly made errors in stage of transformation, process skill, and encoding. While students with kinesthetic learning style mostly made errors in stage of comprehension, transformation, process skill, and encoding, (ii) the causes of mistakes for both students with visual, auditory, and kinesthetic learning styles are that students less understanding of the prerequisite lessons, cannot make mathematical models, and not know the steps to solve problems.
Merancang media peraga yang disertai pedoman operasionalnya merupakan tantangan tersendiri bagi guru di tingkat sekolah dasar. Kegiatan ini merupakan tindak lanjut dari penelitian sebelumnya tentang merancang media peraga lengkap dengan pedoman operasionalnya. Upaya desiminasi hasil penelitian dilakukan pada guru-guru kecamatan Gerung, Lombok Barat dalam mengatasi persoalan pembelajaran matematika. Tujuan dari kegiatan pengabdian ini adalah meningkatkan pengetahuan para guru SD di Kecamatan Gerung tentang konsep dan prinsip tentang pengukuran khususnya konsep luas daerah; kedua, meningkatkan keterampilan merancang media peraga geometri tentang luas daerah serta pedoman operasionalnya. Sebelum melakukan kegiatan ini para peserta diberikan Pretest untuk melihat perubahan yang terjadi setelah kegiatan dilakukan. Kegiatan diikuti oleh 18 orang guru yang berasal dari berbagai sekolah dasar di Gugus V Kecamatan Gerung. Kegiatan pengabdian diawali dengan pendalaman tentang konsep dan prinsip luas daerah utamanya parameter penentu luas daerah dengan cara presentasi, demonstrasi. Kedua, simulasi dan praktek merancang media peraga prinsip luas dan ketiga adalah diskusi dalam kelompok kerja dan presentasi tentang media dan pedoman yang telah dirancang dan demontrasi cara penggunaaannya. Media peraga tentang luas daerah ada 6 yakni prinsip luas daerah persegi panjang, Jajaran genjang, segitiga, trapesium, layang-layang dan prinsip luas daerah lingkaran. Setelah kegiatan pengabdian dilakukan para peserta diberikan Postest. Hasil pelatihan sangat efektif, ini ditunjukkan adanya perbedaan rata-rata yang signifikan antara hasil Pretest dan post-tes. Rata-rata hasil Pretest sebesar 3,9 dan rata-rata Postest sebesar 7,1. Hasil uji t menunjukkan bahwa th = 8,74 > ttab = 2,03, taraf signifikansi 5%. Hal ini juga berarti bahwa terjadi perubahan yang signifikan pada guru Sekolah Dasar di Gugus V di Kecamatan Gerung setelah mengikuti kegiatan pengabdian ini. Selanjutnya, kegiatan ini perlu diperluas ke wilayah yang lain agar para guru SD memiliki pengetahuan dan ketrampilan yang sama dalam rangka menghadapi pendidikan abad 21.
The present descriptive study aims to analyze the misconceptions among prospective mathematics teacher on geometry using three-tier diagnostic tests. The research subjects were 52 students of mathematics education study program in a university in Mataram, Indonesia. The data were collected from students' written work in solving the three-tier geometry test. The test investigated the students' (1) understanding of concepts, (2) reasons, and (3) confidence in answering problems ( 1) and (2). Data analysis performed quantitatively and quantitatively using descriptive method. The results showed that there are: (1) 28.6% students who understood the concept, (2) 10.8% students who only guessed or were not sure of the answer and (3) 60.6% students had misconceptions. Misconceptions that occurred in students can be divided into three categories, namely: (1) pure misconceptions as much as 43.7%, (2) false positives (understanding deficiency) as much as 9.8%, and (3) false negatives (less information or careless) as much as 7.1%. The study implies many attempts are needed to improve prospective mathematics teachers' conceptual understanding in geometry.
In the 2019 survey, 82.2% of teachers never participated in media training, especially learning media based on geogebra technology. Meanwhile, 92.8% of teachers stated that mathematics requires learning media. The low quality of education in NTB requires special attention from both the government and the private sector, so it is important to conduct technology-based learning media training in order to improve the quality of education, especially improving the quality of teachers. The training was carried out using offline and online methods for two days, 19 and 20 August 2021 at SMPN 16 Mataram. The training was attended by 22 participants from junior high school mathematics teachers in the city of Mataram. In the implementation of the training, an evaluation was carried out using questionnaires and observations. The conclusions from the results of the service were as follows: Geogebra training as a medium for learning mathematics for SMP teachers in the city of Mataram in 2021 received a very good response and was well received by the teachers. Geogebra training as a medium for learning mathematics for junior high school teachers in the city of Mataram in 2021 is very in line with what is expected by mathematics teachers in the City of Mataram and increases teacher competence in the context of applying technology in learning to develop technology-based mathematics learning media.
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