Knowledge is the student’s construction result that affect to the more meaningful learning. Sometimes, teachers forget that a student has self-live experiences as their initial concept. When expressed their initial concept, students will be easier to accept new material knowledge, because students will constructing their knowledge indirectly. The constructivism of learning is a teaching and learning process to make students themselves mentally active to construct their knowledge, based on cognitive structure that they ever had before. In the relationship to the student’s geometry concept, it must be considered how the students constructing this concept by their cognitive structure. Memorizing the mathematical formulation is not the guarantee that the students have been mastering to the real geometry. For example, to understand about height line in the triangle, is not an instantaneous process. It can be learned by constructing through an experiment to involving all student hands on activity process. Through the activity to make a height line, measuring, and calculating the triangle area, student will be led on the joyful activity, avoid to the bored, toward the  conclusion that every triangle, there are three height lines for the three triangle’s bases in each area.

The implementation of zoning policy  through the regulations of Minister of Education and Culture No. 51 in 2018 raises new problems in Indonesia. Some of these problems are also experienced by people in Cimahi. This research is motivated by the need for the local government of Cimahi to restructure and rearrange the adequacy of State Elementary Schools graduates to enroll State Junior High Schools in Cimahi. This qualitative descriptive research was carried out by processing data, organizing, analyzing, summarizing, and describing the conditions as they are related to the zoning map data for the 2019/2020 academic year of Cimahi. Zoning map for the 2019/2020 school year, the draft of local regulations of Cimahi, and also Minister of Education and Culture No. 51 of 2018 r concerning admission of new students are processed and analyzed qualitatively to see how adequate the access of education at State Junior High Schools seen from the number of its graduates that can be accommodated, as the effect of zoning policy. From the results of data analyzing, the conclusions are: 1) there is not yet adequate access to education at the State Junior High School level when it is compared to the number of graduates from State Elementary Schools; 2) from the nine zones in the zoning map of Cimahi, there were only 6 graduates from State Elementary Schools that can be accommodated in State Junior High Schools; and 3) there are still a large number of Elementary Schools graduates for the 2019/2020 school year who have not been accommodated in the zoned State Junior High Schools. Therefore, from the result of this study, it can be recommended that the increase in the number off class units is still needed, and the development of New School Units for State Junior High Schools which refers to laws and regulations, which to organize the zoning system in Cimahi in the form of Mayor Regulations.

Learning history in schools has always been based on the process of knowledge transfer, including memorizing textbooks. That kind of method has reduced essence historical thinking, especially in the ability to historical comprehension. For the process to successfully reconstruct knowledge, one way that can be done is to use the history book of local wisdom in ancient manuscripts. The Tanjung Tanah manuscript is one of the ancient documents which contains the value of local wisdom, such as the value of responsibility, respect, and honesty. Through history learning based on local wisdom of the Tanjung Tanah manuscript, it is expected that students will be able to comprehend historical comprehension more quickly. This study uses quantitative methods with a quasi-experimental design. The population is students at grade ten of senior high school in Kerinci Regency, while the sample is students at degree ten of SMA Negeri 2 Kerinci. The results of the study show that learning the history of local wisdom of Tanjung Tanah manuscripts improves the students’ historical comprehension ability.Pembelajaran sejarah di sekolah selama ini masih bertumpu pada proses transfer of knowledge berupa menghafal isi buku teks. Cara tersebut telah mereduksi esensi keterampilan berpikir sejarah, terutama pada kemampuan pemahaman sejarah. Agar terjadi proses reconstruct of knowledge maka salah satu cara yang dapat dilakukan adalah menghadirkan pembelajaran sejarah berbasis kearifan lokal dalam naskah-naskah kuno. Naskah Tanjung Tanah merupakan salah satu naskah kuno yang sarat nilai kearifan lokal, seperti nilai tanggung jawab, sikap hormat, dan kejujuran. Melalui pembelajaran sejarah berbasis kearifan lokal Naskah Tanjung Tanah diharapkan akan terjadi peningkatan kemampuan pemahaman sejarah pada siswa. Penelitian ini menggunakan metode kuantitatif kuasi eksperimen, populasi adalah siswa SMA kelas X di Kabupaten Kerinci, sampel siswa kelas X SMA Negeri 2 Kerinci. Hasil penelitian menunjukkan pembelajaran sejarah berbasis kearifan lokal Naskah Tanjung Tanah efektif meningkatkan kemampuan pemahaman sejarah siswa.

The primary aim of this descriptive study is to identify the extent of Professional Learning Community (PLC) implementation in elementary schools in West Java, Indonesia. Professional Learning community (PLC) is a method that teachers continuously implement to improve their competencies and motivations to achieve. Among the reasons for PLC's little effects on teachers' accomplishment are the facts that teachers are not too active in PLC activities and that PLC activities are not implemented continuously. Considering this problem, this study on PLC is conducted. This study employs survey on elementary school teachers in Indonesia. The findings show that majority of elementary school teachers have not implemented PLC optimally in all its dimensions (socialization, communication, comprehension, compliance and conformity, as well as its strengths and weaknesses). The results of this study are expected to contribute in the designing of an operational and well-structured PLC program that will promote teachers' enthusiasm and motivation to implement PLC and will ensure PLC continuity to provide the best effects on teacher's competencies development.

In general, the learning activity that occurs is more emphasis on the process of learning to learn to answer questions rather than learn how to present the question. Students do not learn how to bring mathematical problems (problem posing)