<p>Penelitian ini dilatarbelakangi oleh rendahnya kemampuan penalaran matematis siswa SMP pada materi geometri. Metode penelitian yang digunakan adalah penelitian desain didaktis (<em>didactial</em> <em>design research</em>).  Penelitian diawali dengan studi pendahuluan untuk mendapatkan data kesulitan belajar (<em>learning obstacle</em>) yang dilaksanakan di SMP Negeri 29 Bandung kelas IXE sebanyak 35 orang, SMA Negeri 1 Lembang kelas XI IPA2 sebanyak 41 orang, dan STKIP Siliwangi Bandung mahasiswa semester VI sebanyak 49 orang pada tahun pelajaran 2011/2012 semester genap. Selanjutnya, dikembangkan desain didaktis yang diujicobakan terbatas kepada 30 siswa kelas VIII B SMP Assalam Bandung. Dari uji coba terbatas dilakukan analisis untuk menyusun desain didaktis revisi. Hasil dari penelitian ini diantaranya perangkat pembelajaran yang digunakan pada pembelajaran sebelum menggunakan desain didaktis belum dapat menggali kemampuan penalaran matematis, desain didaktis penalaran matematis yang dikembangkan dapat memperkecil <em>gap</em> yang dihadapi siswa, dan siswa memberikan tanggapan positif terhadap desain didaktis yang dikembangkan.<strong></strong></p><p>The background of this research was the lack of junior high school students’ mathematical reasoning in geometry. This research used Didactical Design Research (DDR) method which started by a preliminary study to 35 students of grade IX E Public Junior High School 29 Bandung, 41 students of grade XI Science Program of Senior High School 1 Lembang, and 49 students of Siliwangi College of Education Bandung in semester VI for academic year 2011/2012. The preliminary study was aimed to explore students’ learning obstacles to develep didactical design. The developed didactical design was implemented to 30 students of grade VII B of Assalam Junior High School Bandung. After this implementation the developed didactical design was revised. The results of this research were the learning tools used by previous teacher have not explored mathematical reasoning yet, the developed didactical design had minimized students’ gaps, and students had positive response about the learning.</p>

In the world of information technology has changed the lifestyle in the aspect of our lives especially in the educational world. E-Raport is an academic information system used to input web-based student value data. The current value data input system is a benchmark for the creation of quality output and able to compete with other schools. One of the benchmarks that can be the competitiveness for other schools is the result of student learning assessments that are handled by each class. Problems that occur in the input of the value of Raport at SDN Sukanagara is currently still a manual that is the value of Raport recorded in the book Raport, so it takes a long time and a lot of energy needed. Research has the purpose of designing a value information system that facilitates the checking, recording and reporting of the computerized value of the students. Computerized Raport value reports can minimize errors in student data processing. This WEB based online raport is very easy data information and can be accessed anytime and anywhere, the system design works to insert and save value Report data and attendance and display info from school. The system uses data collection methods such as interviews, library studies, and system design, which are context diagrams, and prototypes. The information system of online Raport SDN Sukanagara is expected to be able to bring positive impact to the educational world, especially for SDN Sukanagara in the development of information technology applied in the world of education.

The purpose of this study is to understand students' concepts on indicators exemplifying the level of understanding of student concepts through guided inquiry. The population of this study was all  grade XI students in one of the high schools in Palembang. This research is quantitative research. The results of understanding students' concepts can be seen from the results of the posttest of each class using t-test. Based on the results of the study showed there were differences between students in the experimental class and the control class. This can be seen from the t-test using SPSS 22 obtained significant results (2 –tailled  of 0.00. These results indicate the guided inquiry model has an influence on understanding the concepts of physics.

Rendahnya kemampuan representasi matematis siswa menjadi salah satu penyebab rendahnya prestasi belajar matematika siswa. Hal ini diperkuat dengan hasil laporan TIMSS dan PISA yang menunjukkan rendahnya kemampuan matematika siswa Indonesia. Untuk membantu siswa meningkatkan kemampuan representasi matematis digunakan suatu media pembelajaran matematika. Salah satu media pembelajaran matematika yang dapat merepresentasikan model matematika adalah software GeoGebra. Maka dari itu, penelitian ini bertujuan untuk mengetahui apakah software GeoGebra dapat meningkatkan kemampuan representasi matematis siswa pada materi SPLDV. Sampel dalam penelitian ini adalah siswa kelas VIII.2 SMP Islamic Village tahun ajaran 2015/2016 semester II sebanyak 29 orang dengan purposive sampling. Instrumen penelitian berupa tes uraian untuk mengukur kemaampuan representasi matematis. Metode dalam penelitian ini adalah metode kuantitatif jenis pra eksperimen dengan one group pretest-posttest design. Analisis data penelitian ini menggunakan uji non-parametrik Wilcoxon Signed Ranks Test. Hasil penelitian menunjukkan bahwa penggunaan media software GeoGebra dapat meningkatkan kemampuan representasi matematis siswa pada materi sistem persamaan linier dua variabel (SPLDV). Peningkatan yang diperoleh berada pada kategori sedang sebesar 0,651.Low ability students 'mathematical representation became one of the causes of low achievement of students' mathematics learning. This was reinforced by the results of the TIMSS and PISA report which indicates a low ability students' mathematical Indonesia. To help students improve mathematical representation, it needs to use a medium of learning mathematics. One math learning media that can represent mathematical models were software GeoGebra. Therefore, this study aims to determine whether the software GeoGebra can improve students' mathematical representation at SPLDV material. The sample in this study were students VIII.2 SMP Islamic Village second half of the 2015/2016 school year a total of 29 people with purposive sampling. The research instrument is a test to measure ability description mathematical representation. The method in this research is quantitative method the type of pre experiment with one group pretest-posttest design. Analysis of experimental data was using non-parametric test of Wilcoxon Signed Ranks Test. The results showed that the use of GeoGebra software media can improve students' mathematical representation of the material system of linear equations of two variables (SPLDV). Increased obtained in middle category amounted to 0.651