Effective teachers will always look for better ways in teaching. There are four components that need to be considered for effective teachers. The four components are the first teacher having mastery of knowledge about teaching materials and teaching materials taught by both teachers having critical thinking skills and able to solve the problems that exist in the learning of the three teachers has the ability of knowledge about the characteristics of students and master the learning methods. And the four teachers have skills in teaching and can communicate well with students. Thus, the purpose of discussion from this research report is to describe the effective teacher.

Udang merupakan salah satu komoditas subsektor perikanan utama dalam ekspor Indonesia. Penelitian ini bertujuan untuk: (1) membandingkan keuntungan usaha udang vaname dengan sistem intensif dan konvensional, (2) mengidentifikasi kelayakan finansial usaha udang vaname.  Penelitian ini menggunakan pendekatan deskriptif, komparatif dan kuantitatif. Lokasi penelitian berada di Kabupaten Situbondo. Pendekatan analisis yang digunakan adalah perbandingan laba dan analisis keuangan. Temuan penelitian ini antara lain: (1) terdapat perbedaan tingkat keuntungan budidaya udang vaname berdasarkan sistem tambak yang digunakan, sistem intensif lebih menguntungkan daripada sistem non-intensif, 2) usaha udang vaname secara finansial bisa dilakukan; NPV sistem intensif positif (=Rp 64.980.480.855); B/C Bruto (= 8,9) > 1; B/C Bersih (= 15,09) > 1; IRR (= 45,76%/bulan) > i dengan payback period 3,4 bulan sejak seedling. NPV sistem konvensional (=Rp 611.389.120); B/C Bruto (= 2,43) > 1; B/C Bersih (= 2,78) > 1; IRR (= 42,86%/bulan) > i dengan payback period 3,5 bulan sejak seeding.

The water quality analysis activities carried out by smallholder farmers with the construction of cement walls and cement pond bases on the Konang beach, Panggul District, Trenggalek Regency, have not met the standard standards in the analysis of pond water quality. Pond farmers only analyze the pH, brightness and temperature of the pond water. The research objective was to obtain information and describe the analysis of water quality in the community pond construction of cement walls and the bottom of cement ponds at Konang beach, Panggul District, Trenggalek Regency. The activity of analyzing the water quality of the community plots of construction of cement walls and the bottom of the cement ponds on the Konang beach, Panggul District, Trenggalek Regency, was observed in the form of temperature, brightness and pH, with a pond area of ​​250 m2. Water quality observation activities for 30 days, in one day water quality observations are made twice, namely in the morning and evening. The pH measurement results were obtained, ranging from 7.4 to 8.5, so that the results of measuring the pH of the water in the people's ponds in Koneng Beach were still normal or normal. According to Boyd (2001) in Andi S and Sahabuddin (2014), it is said that water organisms (fish or shrimp) require a pH range of 6.8 - 8.5. the results of measuring the brightness with a simple tool, the measurement results are between 25-40 cm. Badrudin et al (2014) stated that the optimum brightness level of pond water which is influenced by plankton density is around 20 - 40 cm. So that the level of brightness can be concluded that it is still in rational or optimal. The temperature in the ponds was 24 ᴼC - 28 ᴼC, still within normal or optimal. According to Supito (2017), the pond temperature in the range of 28 ᴼ C to 32 ᴼ C is the optimal temperature forcultivating vaname shrimp.

The purpose of the research is to describe, know and understand the value of depreciation fixed assets  with Straight line method.  At the Household Scale Hatchery (HSRT) grouper fish, village Pasirputih, Bungatan, Situbondo City. Qualitative research methods, descriptive type. The data collected is primary and secondary data. Respondents are taken by purposive sampling in which respondents are taken based on certain criteria. To calculate depreciation of fixed assets and their impact on profits, the Straight Line method is used. The size of the larvae is between 2.5 x 2 x 1.3 m to 4 x 2.5 x 1.8 m, like grading 2.5 x 2 x 1.5 to 3 x 2 x 1.5 m, like a palnton 1.5 x 1.5 x 1 m up to 3 x 2.5 x 1.8 m, rotifer tanks 1.5 x 1.5 x 1 up to 2.5 x 2 x 1.5 m and tanks of size 3 x 3 x 1.8 m up to 4 x 2.5 x 2 m. Fish that are turned over at household scale seedlings (HSRT), in Pasirputih Village, Bungatan District, Situbondo Regency are groupers. Farmers during HSRT operations, have never calculated depreciation of their HSRT infrastructure.

Natural feed has a very important role in supporting the success of aquaculture. The availability of natural feed is a key factor in the seed / fry phase, where at that phase the fish are still unable to consume additional feed, namely pellet feed. The objectives of this activity are: (1) Introducing Artemia, Improving the entrepreneurial spirit and entrepreneurial motivation, (3) Increasing the knowledge and abilities of SMK Ibrahimy 1 Sukorejo students in terms of decapsulation and artemia culture. This activity targets the fishery students of SMK Ibrahimy 1 Sukorejo, Department of Agribusiness, Brackishwater and Marine Fisheries. Service activities are carried out using lecture and demonstration/practice methods. Evaluation was carried out on the ability of participants to practice artemia decapsulation and artemia culture, indicators of the success of this practice are theoretical and practical knowledge of Artemia sp culture. The success of this activity can be seen from the very high enthusiasm of students and the increasing knowledge of students about the decapsulation of Artemia sp. The obstacle that is used as an evaluation in this activity is that several additional tools are still needed to maximize the decapsulation practice of Artemia sp.