Objectives of the Activity This training is expected to be more creative in teaching practicum and teaching planning by applying the right strategy to develop teachers' creativity in using simple tools and materials when practicum and student interest to learn more in improving scholarship in biology learning. This devotion is done in SMA Negeri 5 Kota Padangsidimpuan, the time of implementation is adjusted to the MGMP Teacher - High School Biology subject. This dedication is executed for two months from January - February 2017 where the activities are done for four days in thedifferentperiod.The result of this teaching materials development workshop is that the teachers of Biology at SMA Kota Padangsidimpuan have gained much motivation, related information / knowledge in developing lesson plan and making of practicum with simple materials also predicted in the future the teachers of Biology especially in SMA are able develop simple practice materials on their own.Keywords: Training, Development of RPP, Simple Practicum.

AbstrakBackground: Sungai Batang Gadis merupakan sungai yang sangat penting sebagai penyedia air untuk mendukung kelangsungan hidup dan kegiatan perekonomian utama masyarakat, yaitu pertanian. Disepanjang pinggiran sungai Batang Gadis banyak ditemukan daerah pertanian masyarakat yang memanfaatkan irigasi dari aliran sungai Batang Gadis. Tujuan dari penelitian ini adalah untuk menentukan tingkat pencemaran pestisida di Sungai Batang Gadis Mandailing Natal. Metode : Metode survey digunakan dalam penelitian ini dengan mengambil dua titik sampling yaitu Muara Mais dan Tamiang. Penentuan titik sampling menggunakan Purposive sampling method. Pengambilan sampel air, tanah dan ikan yang diambil dianalisis menggunakan Gas Kromatografi. Hasil : Hasil penelitian menunjukkan residu pestisida hanya ditemukan pada stasiun II (Muara Mais). Residu pestisida yang ditemukan pada air, sedimen tanah dan ikan dari golongan organofosfat yang terdeteksi adalah diazinon, malation, dan klorfirifos sedangkan dari golongan organoklorin aldrin, dieldrin dan endosulfan. Selain residu pestisida juga ditemukan residu pupuk yaitu fosfat, amonia, nitrat, nitrit dan sulfida. Kesimpulan : Residu pestisida pada Sungai Batang Gadis yang ditemukan hannya pada titik lokasi yang ditemukan daerah pertanian disepanjang pinggiran sungai tersebut. Kadar residu pestisida dan juga residu pupuk yang ditemukan masih berada di bawah Batas Maksimal Residu (BMR) pestisida. Konsentrasi residu pestisida organofosfat tersebut yang terbesar terdapat pada tanah, lalu ikan dan terakhir air, sedangkan organoklorin terbesar pada ikan, air kemudian tanah. AbstractBackground: Batang Gadis River is a river that is very important as a water provider to support the survival and main economic activities of the community, namely agriculture. Along the banks of the Batang Gadis river, many community farms are found that utilize irrigation from the Batang Gadis river. The study was conducted to determine the level of pesticide pollution in the Batang Gadis Mandailing Natal river. Methods:The survey method was used in this study by taking 2 sampling point locations. Determination of sampling locations using purposive sampling method. Water, sediment and biota sampling from each study location will be analysized using a Gas Chromatograph (GC) methode. Result: The results showed that pesticide residues were only found at Station II (Muara Mais). Pesticide residues found in water, soil sediments and fish from the organophosphate group detected were diazinon, malation, and chlorphyrifos while those from the organochlorine group were aldrin, dieldrin and endosulfan. In addition to pesticide residues, fertilizer residues are also found, namely phosphate, ammonia, nitrate, nitrite and sulfide. Conclution: Pesticide residues in Batang Gadis River which were found only at the location found by agricultural areas along the river bank. Pesticide residue levels and fertilizer residues found are still below the pesticide Maximum Residue Limit (BMR). Concentrations of these organophosphate pest...

Critical thinking skills are part of the important things that must be mastered by students in facing challenges in the 21st century. This aims to improve problem solving skills. Critical thinking skills mean getting used to seeking the truth of all information obtained by finding out and exploring this information through valid data. This research method is a literature review. This study aims to find out that the application of the Project Based Learning learning model can improve elementary students' critical thinking skills. In this learning the teacher acts as a facilitator so that students are more directed at the freedom to build their own knowledge so that the learning that takes place is more meaningful.

This study aims to determine the effectiveness of the role of ethnomatematics based on traditional crank game in increasing the ability of students to understand mathematical concepts at SD MuhammadiyahSipirok and their responses to learning. This type of research is qualitative research. The learning model developed is a type of traditional game where elementary school students will be more enthusiastic about learning mathematics, especially in flat shape material where the concepts used will improve students’ understanding of mathematical concepts. From the results of the analysis of observations during the learning process and the results of interviews conducted by comparing the tcount and ttable values that the calculated value is greater than the table value and the results of the questionnaire students’ responses to learning with the use of ethnomatematics based on traditional crank games are already in the very happy category because each None of the students scored 30 below or obtained half the expected maximum score of 60 where all students were above 30. The results of the research will be the type of flat shape in the crank game, the problem of the suitability of the crank game with the flat shape material and its understanding, the flat shape is used as contextual learning. Keywords: Ethnomatematics; traditional games; Muhammadiyah; contextual learning

“CALISTUNG”refers to the achievement of children on reading, writing, and counting. “CALISTUNG” becomes one indicator for the children on their development in the first grade of elementary school. Commonly, the children on its will have much time in the home with their mother, in which, the mother needs to look the development of them in order they have well achievement on “CALISTUNG”. For this case, the achievement will be a benefit for the children to enrich as well as develop their knowledge for the future. Thus, an appropriate strategy from the mother should be needed to improve the achievement of thei children, whereas, it is one indicator. By having this program, the team tries to describe an appropriate strategy for the mother in developing as well as improving the achievement of “CALISTUNG” based on visual media, in which, it is focused to the mother’s community in University of Muhammadiyah Tapanuli Selatan. This program is taken based on workshop method, it gives the materials about developing and improving achievement of the children on “CALISTUNG” based on visual media. The result shows that there is an effective achievement of the audiences to maximal the using of visual media in improving the achievement of their children on “CALISTUNG”. Hence, they can have the maximal using of an appropriate visual media to manage the development of their children on “CALISTUNG, whereas, they gets the media based on children needs.