Redox reaction matter which seems to be abstract makes students of X science grade difficult to understand the concept. Therefore, student-centered learning using teaching matter which has analyzed students’ character or as known as scientific-based approach LKPD is necessary. This research aimed to identify the students’ cognitive results after learning redox reaction matter using a scientific-based approach LKPD. The research was done at SMAN 1 Dukupuntang, Cirebon in the 2016-2017 school year using pre-experimental method with one-shot case study research design. The sample was students of X science 2 grade. The data collection was done via a questionnaire. The analysis technique was quantifying the result percentage before and after using LKPD. This research served LKPD data which involved learning activities such as (a) observing, (b) asking, (c) collecting the data, (d) associating, and (e) communicating whichstimulatedstudents to learn redox reaction matter actively. The pretest result showed that the students’ completeness percentage was 66,67% while the protest result using LKPD showed that the percentage increased to be 86,67%. The conclusion was using a scientific-based approach LKPD on redox reaction matter was successful to enhance students’ cognitive learning outcomes and fulfill the minimum completeness criteria (KKM)

The crab shell waste contains many chitins. When it processed in several chemical processes, it can produce chitosan, which has many benefits and economic value. Chitosan is a linear polysaccharide that consists of N-acetyl glucosamine and D-glucosamine monomers. This study aims to determine the optimum condition of temperature and time of the deacetylation process from the chitin crab shell (Portunus pelagicus) to be chitosan. There are three stages of making chitosan; deproteination, demineralization, and deacetylation. In the deproteination process, crab shell powder was added with a 3.5% NaOH at 65 oC while being stirred for 2 hours. In the demineralization process, crab shell powder was added by 1 N HCl solution for 30 minutes at room temperature. The deacetylation process was done by heating the chitin with NaOH 50% solution with a ratio of 1:10 (w/v) at 90o C for 2 hours. In every step of making chitosan when the stirring has been completed, then it's neutralized using aqua dest and dried in the oven for 24 hours. Chitosan that produced has the highest degree of deacetylation is 79.68%.

Chemical Write Students Worksheet (LKPD Chemical) has been applied in MAN 1 Cirebon City and MAN 1 Plered Cirebon Regency. It still not contribute to the student's science-religious character. The LKPD Chemical On the Material Structure of the Atom developed based on the values of the Quran are expected to contribute to the science-religious character of the MAN students. These study aims are to determine: (a) The percentage of the feasibility of the Qurani Students Worksheet, (b) The effectiveness of using that, and (c) The science-religious character building of students at MAN 1 Cirebon City and MAN 1 Plered Cirebon Regency. The type of research used is research and development using the ADDIE model, which consists of analysis, design, development, and evaluation. The phase of analysis is done by analyzing the methods, users, and teaching materials. The LKPD is designed by designing the map of the material, the outline of LKPD, display, and application. The development is done starting from preproduction content, the chemistry with Al-Quran, production, post-production, and validation. The evaluation is performed by the application on a small and large scale. The result of the feasibility is 82,45%; the percentage of the value indicates of LKPD is appropriate to use. The effectiveness of using Qur'ani student's worksheet is in the category of large and medium scale. The category shows that LKPD Qur'ani is effectively used in learning Al-Qur'an based chemistry. The characters of the science-religious formed are honesty, discipline, cooperation, and hard work. The formation of these characters is expected to give birth to an intelligent generation, have worked, and have good character.

Masyarakat desa mertasinga umumnya bekerja sebagai pengumpul daging rajungan, yang kemudian hasilnya dijual ke pabrik-pabrik, jika masyarakat mempunyai keahlian mengolah daging rajungan tersebut menjadi aneka makanan tentunya akan memberikan nilai ekonomis yang lebih tinggi, jika dibandingkan hanya mengumpulkan daging saja. Tujuan pengabdian masyarakat adalah memberdayakan masyarakat untuk mengolah daging rajungan menjadi nuget rajungan, agar dapat menghasilkan nilai jual yang lebih tinggi jika dibandingkan hanya menjual daging rajungan saja sehingga dapat meningkatkan pendapatan warga. Tehnik sampling yang digunakan adalah simple random sampling. Dengan menggunakan tehnik pengumpulan data dilakukan melalui pengamatan, wawancara dan dokumentasi. Data dianalisis dengan menggunakan tehnik analisa data deskriptif kualitatif. Hasil pengabdian ini adalah keterampilan peserta dalam membuat nugget rajungan yang sehat dan bergizi tinggi tanpa zat adiptif sintetis didapatkan  nilai rata-rata peserta sebesar 82,075 %. Kesimpulan dari pengabdian ini adalah pengolahan daging rajungan agar mempunyai nilai jual yang lebih tinggi dapat diolah menjadi nugget, dengan menjaga kualitas rasa dan gizi agar enak dan aman dikonsumsi maka digunakanlah zat adiptif dari bahan alami.

This study aims to find out effectiveness of household waste management based on the concept of waste alms carried out by students and parents of elementary school students in collaboration with the school. This study is quantitative descriptive research that was conducted on 100 students in one of Cirebon sub-district elementary schools. In this research, students donate domestic waste every week. The Purpose of this study was to provide students with an understanding of the importance of protecting the environment trough reducing household waste. The observation sheet was used as the research instrument of this study. The results showed that the concept of waste alms in household waste management which is integrated with elementary school education units can reduce 2.17% of the volume of waste growth