This study is a quasi-experimental research with pretest-posttest control group design, which aims to determine (1) the tendency of students in using various media scaffolding based on gender, and (2) effect of media scaffolding on increasing understanding of students' geometry concepts. Media scaffolding used this study is chart, props, and visual. The population was the fifth grade students of State Elementary School I Gunung Terang (total 40 students), Bandar Lampung, Indonesia of the academic year 2015-2016. The sample was total sampling, respectively 20 students in the experimental class (with media scaffolding) and control class (without media scaffolding). Data were collected through observation, interview and test. Analysis of the observation and interviews data with descriptive statistics (percentage). and the test data was analyzed by (a) measuring the level of effectiveness on increasing understanding of students' geometry concepts with formula of Hake's Normalized Gain (g) and its interpretation, and (b) examine of hypotesis on level of effectiveness with t-test. The results of research showed that (1) the tendency of male students using the media scaffolding props, and female students using scaffolding media chart, and (2) effect of media scaffolding on increasing understanding of students' geometry concepts is effective enough.
Matematika merupakan salah satu pelajaran yang materinya memiliki karakteristik tertentu bila dibandingkan dengan pelajaran lain. Karakteristik tertentu tersebut seperti materinya bersifat abstrak, logis, sistematis, dan menggunakan simbol yang bersifat universal. Karakteristik inilah yang menjadi salah satu faktor matematika sulit dipahami siswa, apalagi siswa SD (sekolah dasar). Untuk membantu kesulitan siswa tersebut maka perlu pemanfaatan media pembelajaran sebagai sarana yang memudahkan belajar siswa, seperti media audio visual. Tujuan kegiatan pengabdian adalah meningkatkan penge-tahuan guru SD tentang media-visual matematika, dan keterampilan guru SD dalam membuat media audio visual matematika. Sasaran kegiatan pengabdian adalah guru SD yang mengajar matematika di Kota Bandar Lampung sebanyak 32 orang. Kegiatan pengabdian dilaksanakan selama 6 hari, yaitu 1 hari untuk penyampaian materi/teori (Sabtu, 9 Oktober 2021, dilaksanakan di ruang kuliah G9, Gedung G FKIP Universitas Lampung) dan 5 hari untuk pembimbingan praktek (Senin-Jumat, 11-15 Oktober 2021, dilaksanakan secara daring/online). Hasil yang diperoleh dari kegiatan pengabdian ini adalah (1) meningkatknya pengetahuan guru SD dalam membuat media audio visual dengan N-Gain sebesar 0,88 (rata-rata skor pretes: 46,95; dan rata-rata skor postes: 95,08), dan (2) meningkatnya keterampilan guru SD dalam membuat media audio visual; hal ini ditunjukkan oleh media audio visual yang dihasilkan guru.
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