The purpose of this research was to show open-ended questions about surface area and beam volume which valid and practice, have potential effect. This research is research development which consists of two main phases: preliminary phase (preparation phase and problem design) and formative evaluation phase (evaluation and revision phases). The objective of the study is the students of VIII.2 class of Junior High School 55 Palembang. The result of the study got 9 questions open-ended of surface area and beam volume materials which valid and practical. In addition, there was the potential effect of students' mathematical ability on the open-ended questions that have been given. The result of open-ended problem in the concept potential effect was 77,53%, reasoning ability was 59,79%, the communication ability was 57,02%, and problem solving ability was 67,01 %.
The program of applying science and technology to the community (PPIM) was carried out for 9 months, located in the Kampung Bumi Baru Blambangan Umpu Way Kanan, the partners in this program were women of Alhidayah recitation. This program is increasing public knowledge through Budikdamber education with Aquaponics in narrow areas. Budikdamber stands for fish and vegetable cultivation in buckets, namely raising livestock and farming with limited land, budikdamber can be a very appropriate choice in overcoming food problems. The lack of public knowledge about aquaponics culture has resulted in the need to carry out this program. The purpose of this PPIM is to increase the knowledge, capabilities and skills of partners, optimize yard land and business capital used for cultivating fish and plants and increase income and save on partner expenses. The implementation of this PPIM first coordinated with village officials, then continued with education on budikdamber with lecture and discussion methods, accompanied by training on budikdamber which included making, caring for fish, planting kale, and water changing techniques (penyiponan). The output of this activity is: the birth of a group of people who have knowledge of Budikdamber application and the open opportunity of the business. Abstrak Kegiatan program penerapan iptek kepada masyarakat (PPIM) ini dilaksanakan selama 9 bulan, bertempat di kampung Bumi Baru Blambangan Umpu Way Kanan, mitra dalam program ini adalah ibuibu pengajian Alhidayah. Program ini adalah peningkatan pengetahuan masyarakat melalui pendidikan Budikdamber dengan Aquaponik dilahan sempit. Budikdamber singkatan dari budidaya ikan dan sayuran dalam ember, yaitu berternak dan bertani dengan lahan terbatas, budikdamber dapat menjadi salah satu pilihan yang sangat tepat dalam mengatasi permasalahan pangan. Kurangnya pengetahuan masyarakat tentang budikdamber dengan aquaponik ini mengakibatkan perlunya dilakukan program ini. Tujuan dari PPIM ini adalah meningkatkan pengetahuan, kemampuan dan keterampilan mitra, mengoptimalkan lahan pekarangan dan modal usaha yang digunakan untuk melakukan budidaya ikan dan tanaman serta meningkatkan pendapatan dan menghemat pengeluaran mitra. Pelaksanaan PPIM ini terlebih dahulu berkoordinasi dengan perangkat desa, kemudian dilanjutkan penyuluhan budikdamber dengan metode ceramah dan diskusi, disertai pelatihan budikdamber yang meliputi cara pembuatan, perawatan ikan, menanam kangkung, dan teknik pergantian air (penyiponan). Output kegiatan ini adalah: lahirnya kelompok masyarakat yang memiliki pengetahuan dengan mengerti dan paham akan penerapan Budikdamber serta dapat membuka peluang usaha.
Students' poor performance in Geometry is due to their problem in visualizing. Therefore, teaching strategy for Geometry should be embedded with visualization techniques. Visual learning Geometry Kits also known as VLGeo-Kits, is a teaching approach that consists of 3-Dimension blocks, screencast video and SketchUp Make. The purpose of this study is to investigate the effects of VLGeo-Kits in developing students' performance in Geometry for topic Plans and Elevations. This study was conducted using a quasi-experimental single group pre-post-test which was employed for five weeks. A total of 54 form three students were involved in this study. Van Hiele Geometrical Thinking (vHGT) test was given to the samples before and after their learning using VLGeo-Kits. The findings showed very positive development in geometry thinking after learning using VLGeo-Kits. It was found that, none of the samples was at visualization level and majority of the students (59.3%) were at informal deductive level. The finding indicated that the students' level of vHGT after learning using VLGeo-Kits was higher as compared to without using VLGeo-Kits. In addition, Z obtained with p-value was -5.982 proving there was a significant difference in students' level of vHGT test before and after learning using VLGeo-Kits. In conclusion, the findings showed that VLGeo-Kits had succeeded in enhancing students' level of geometrical thinking. Hence, this teaching approach should be implemented in the curricular of mathematics for secondary school.
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