Iklim Sekolah dan Dukungan Sosial Guru Matematika sebagai Prediktor Keberhasilan Prestasi Belajar Matematika Siswa SMA

Tujuan dari penelitian ini adalah untuk memprediksi prestasi belajar matematika siswa Sekolah Menengah Atas (SMA) berdasarkan pada iklim sekolah dan dukungan sosial guru matematika. Penelitian ini menggunakan pendekatan kuantitatif dengan desainkorelasional untuk menguji iklim sekolah dan dukungan sosial guru matematika sebagai prediktor keberhasilan prestasi belajar matematika siswa SMA. Analisis data yang digunakan adalah analisis regresi berganda. Subjek penelitian merupakan siswa kelas XIjurusan IPA berjumlah 88 siswa. Penelitian ini dilakukan di salah satu SMA Negeri di Yogyakarta. Alat ukur yang digunakan adalah skala iklim sekolah dan skala dukungan sosial guru matematika serta nilai murni UAS matematika kelas XI IPA. Hasil uji hipotesismenunjukkan bahwa iklim sekolah dan dukungan sosial guru matematika baik bersama maupun parsial tidak dapat memprediksi prestasi belajar matematika siswa SMA ataudengan kata lain hipotesis dalam penelitian ini ditolak.Tujuan dari penelitian ini adalah untuk memprediksi prestasi belajar matematikasiswa Sekolah Menengah Atas (SMA) berdasarkan pada iklim sekolah dan dukungan sosialguru matematika. Penelitian ini menggunakan pendekatan kuantitatif dengan desainkorelasional untuk menguji iklim sekolah dan dukungan sosial guru matematika sebagaiprediktor keberhasilan prestasi belajar matematika siswa SMA. Analisis data yangdigunakan adalah analisis regresi berganda. Subjek penelitian merupakan siswa kelas XIjurusan IPA berjumlah 88 siswa. Penelitian ini dilakukan di salah satu SMA Negeri diYogyakarta. Alat ukur yang digunakan adalah skala iklim sekolah dan skala dukungansosial guru matematika serta nilai murni UAS matematika kelas XI IPA. Hasil uji hipotesismenunjukkan bahwa iklim sekolah dan dukungan sosial guru matematika baik bersamamaupun parsial tidak dapat memprediksi prestasi belajar matematika siswa SMA ataudengan kata lain hipotesis dalam penelitian ini ditolak.The purpose of this research is to predict senior high school students mathematicachievement based on school climate and mathematic teachers social support. The method ofthis research is qualitative approach by correlation design that test school climate andmathematics teacher social support as predictor of high school students mathematic achie-vement. Data are analyzed by regression analysis. The subjects of this research are 88 (eightyeight) senior h igh school students in Yogyakarta. The measurement tools used in thisresearch are school climate scale, mathematics teacher social support scale, and mathematicspure score of senior high school students. The finding shows that school climate and mathe-matics teachers social support, collectively or partially, cannot predict senior high schoolstudents mathematics achievement; therefore the hypothesis is denied.The purpose of this research is to predict senior high school students mathematicachievement based on school climate and mathematic teachers social support. The method ofthis research is qualitative approach by correlation design that test school climate andmathematics teacher social support as predictor of high school students mathematic achie-vement. Data are analyzed by regression analysis. The subjects of this research are 88 (eightyeight) senior h igh school students in Yogyakarta. The measurement tools used in thisresearch are school climate scale, mathematics teacher social support scale, and mathematicspure score of senior high school students. The finding shows that school climate and mathe-matics teachers social support, collectively or partially, cannot predict senior high schoolstudents mathematics achievement; therefore the hypothesis is denied.The purpose of this research is to predict senior high school students mathematicachievement based on school climate and mathematic teachers social support. The method ofthis research is qualitative approach by correlation design that test school climate andmathematics teacher social support as predictor of high school students mathematic achie-vement. Data are analyzed by regression analysis. The subjects of this research are 88 (eightyeight) senior h igh school students in Yogyakarta. The measurement tools used in thisresearch are school climate scale, mathematics teacher social support scale, and mathematicspure score of senior high school students. The finding shows that school climate and mathe-matics teachers social support, collectively or partially, cannot predict senior high schoolstudents mathematics achievement; therefore the hypothesis is denied

Pengembangan Lembar Kegiatan Peserta Didik (Lkpd) Berbasis Konstruktivisme pada Pokok Bahasan Laju Reaksi

The objective of this research is to develop the student's work sheet on the subject of reaction rate.The research is done in FKIP Riau University. The method of this research is design reserach with the 4-D model which include Define, Design, Develop, and Disseminate. But this research is done until develop. The data research is validation's result of student work sheet based on constructivism on reaction rate. The data analysis technique is descriptive statistic analysis and analysis done by percentage of validation score. The average scores of valuation by validator's team from four expendiency components such as content, language, layout, and graphical are 92,86%, 93,33%, 95,83%, and 93,75%. In spite of average score totally of student worksheet based on contructisvism on reaction rate is 93,94% which is valid criteria. It means means student work sheet that is developed ready to use. Whereas percentage response of students is 95,75% to very good criteria

Penerapan Media Pembelajaran Hidrokarbon Berbasis Aurora 3d Presentation untuk Meningkatkan Prestasi Belajar Peserta Didik di Kelas XI Mipa Sman 1 Kampar

The research aims to increase student learning achievement on the topic of hydrocarbon inclass XI MIPA Senior High School (SMAN) 1 Kampar. Aurora 3D Presentation was used when the teacher explained the topic being able to explain abstract concepts into concrete, one of them on the topic of hydrocarbon. The research was a kind of experiment research with pretest-posttest design. The samples of this research were the students of class X­I MIPA 3 as the experimental class and students of class XI MIPA 4 as the control class. Experimental class is a class that is applied to media Aurora 3D Presentation while the control class was not. Data analysis technique which is used is t-test. Based on data analysis of data obtained tcount> ttable is 2,30 >1,67, it means that the application of Aurora 3D Presentation as media presentation can improve student learning achievement on the topic of hydrocarbon in class XI MIPA Senior High School (SMAN) 1 Kampar, increase learning of 7,03%

Penerapan Metode Pembelajaran Aktif Cooperative Script untuk Meningkatkan Prestasi Belajar Siswa pada Pokok Bahasan Struktur Atom di Kelas X Mia SMA Negeri 1 Kepenuhan Kabupaten Rokan Hulu

Research on the application of active learning Cooperative Script method has been done in class X of SMAN Kepenuhan Kabupaten Rokan Hulu on the subject of atomic structure. Based on the results of observations conducted by researchers at the SMAN1Kepenuhan Kabupaten Rokan Hulu do known that learning is teacher centered, so that students become less active and negatively affect student achievement. The objective was to determine the increase in student achievement and increase student achievement category. The research form is an experimental research with pretest-posttest design. The sample consisted of two classes, namely class X MIA1 as the experimental group and the class X MIA2 as the control group. The experimental group is the group of students who were treated by applying the active learning of Cooperative Script method, while the control group was treated with information discussion methods. Data analysis technique used is the t-test. The results showed tarithmetic>ttable (2,07 > 1,68) and N-gain of the experimental group is 0,754 which includes the high category. Therefore, it can be concluded that the application for active learning Cooperative Script method can increase student achievement in the subject of anatomic structure in SMAN 1 Kepenuhan Kabupaten Rokan Hulu

Pengembangan Lembar Kegiatan Peserta Didik Berbasis Problem Based Learning (Pbl) pada Mata Pelajaran Kimia SMA Pokok Bahasan Larutan Asam dan Basa

The study of Development chemistry worksheet based problem based learning on acid and base Solutions (chemistry). The result of this Development research is student worksheet product which can be used by students in the process of learning. The device development model suggested by Thiagarajan, Semmel, and Semmel (1974) is a 4-D Model consisting of 4 stages, such as: Define, Design, Develop, and Disseminate. The research development with 4-D model was conducted only Define, Design, and Development step, because the purpose of this research was limited to develop and produce a valid student worksheet to be implemented based on validator assessment. The result of research shows as the average score of the four aspect assessment of the student worksheet which is validated: content: 88,125%, language: 98,43%, presentation: 84,375%, and successive graphics: 95,31% by the validators. Thus, the overall average score of student worksheet validation the acid and base solution on Problem Based Learning is 91,56%. Based on the eligibility criteria of learning tools in Riduwan (2012), the criteria of 91,56% analysis included in valid category

Penerapan Prezi Dekstop sebagai Media Presentasi untuk Meningkatkan Prestasi Belajar Siswa pada Pokok Bahasan Hidrokarbon di Kelas X SMA Negeri 9 Pekanbaru

The research aims to increase student learning achievement on the topic of hydrocarbons in class X Senior High School (SMAN) 9 Pekanbaru. Prezi Dekstop is used when the teacher explains the topic being able to explain abstact concepts into concrete, one of them on the topic of hydrocarbons. The research is a kind of experiment research with pretest-posttest design. The samples of this research were the students of class X4 as the experimental class and students of class X2 as t

Wading through the swamp: what does tropical peatland restoration mean to national-level stakeholders in Indonesia?

Ecological restoration is considered to play an important role in mitigating climate change, protecting biodiversity and preventing environmental degradation. Yet, there are often multiple perspectives on what outcomes restoration should be aiming to achieve, and how we should get to that point. In this paper we interview a range of policy makers, academics and NGO representatives to explore the range of perspectives on the restoration of Indonesia's tropical peatlands – key global ecosystems that have undergone large‐scale degradation. Thematic analysis suggests that participants agreed about the importance of restoration, but had differing opinions on how effective restoration activities to date have been and what a restored peatland landscape should look like. These results exemplify how ecological restoration can mean different things to different people, but also highlight important areas of consensus for moving forward with peatland restoration strategies

Evaluation of appendicitis risk prediction models in adults with suspected appendicitis

Background Appendicitis is the most common general surgical emergency worldwide, but its diagnosis remains challenging. The aim of this study was to determine whether existing risk prediction models can reliably identify patients presenting to hospital in the UK with acute right iliac fossa (RIF) pain who are at low risk of appendicitis. Methods A systematic search was completed to identify all existing appendicitis risk prediction models. Models were validated using UK data from an international prospective cohort study that captured consecutive patients aged 16–45 years presenting to hospital with acute RIF in March to June 2017. The main outcome was best achievable model specificity (proportion of patients who did not have appendicitis correctly classified as low risk) whilst maintaining a failure rate below 5 per cent (proportion of patients identified as low risk who actually had appendicitis). Results Some 5345 patients across 154 UK hospitals were identified, of which two‐thirds (3613 of 5345, 67·6 per cent) were women. Women were more than twice as likely to undergo surgery with removal of a histologically normal appendix (272 of 964, 28·2 per cent) than men (120 of 993, 12·1 per cent) (relative risk 2·33, 95 per cent c.i. 1·92 to 2·84; P < 0·001). Of 15 validated risk prediction models, the Adult Appendicitis Score performed best (cut‐off score 8 or less, specificity 63·1 per cent, failure rate 3·7 per cent). The Appendicitis Inflammatory Response Score performed best for men (cut‐off score 2 or less, specificity 24·7 per cent, failure rate 2·4 per cent). Conclusion Women in the UK had a disproportionate risk of admission without surgical intervention and had high rates of normal appendicectomy. Risk prediction models to support shared decision‐making by identifying adults in the UK at low risk of appendicitis were identified

High-performance bimetallic catalysts for low-temperature carbon dioxide reforming of methane

Catalytic dry reforming of methane (DRM) is a promising way for renewable syngas production due to the utilization of both CO2 and CH4 greenhouse gases. Current approaches were made to improve the catalytic activity and coke resistance by introducing a second metal into the Ni-based catalytic system. This bimetallic catalytic system showed a significant improvement in coke resistance due to the synergistic effect of both metals towards the reaction. This review summarizes recent developments in bimetallic catalysts in DRM which focused on the evaluation of catalysts, deactivation studies, and reaction mechanisms of developed bimetallic catalysts