Perumuman Lemma Snake Dan Lemma Lima

. -exact sequences was introduced by Davvaz dan Parnian-Garamaleky as a generalization of exact sequences. In this paper, we give some characterizations and properties of -exact sequences. We use these result to find a generalization of Snake Lemma and Five Lemma. Key words Kunci : -exact sequences, Snake Lemma, Five Lemm

Penerapan Model Pembelajaran Kooperatif Tipe Snowball Throwing Pada Pembelajaran Segiempat Untuk Meningkatkan Aktivitas Dan Prestasi Belajar Siswa SMPN 1 Lingsar Kelas Vii-1 Tahun Pelajaran 2012/2013

: This research aims to improve the activity and student learning outcomes SMPN 1 Lingsar class VII-1 on the rectangular material through the implementation of cooperative learning model type thowing Snowball. This research is a classroom action research conducted in two cycles. The results showed that the application of the learning model can improve the activity and student learning outcomes. This is demonstrated by the student activity score relatively high on the first cycle and very high in the second cycle. While the average score on the evaluation of student learning has increased in each cycle, namely in the first cycle an average score of 58.2 on the evaluation study with classical completeness 50% and the second cycle the average score on the evaluation study reached 85.74 with classical completeness 89%. These achievements show that the application of cooperative learning model type Snowball Throwing on the rectangular material can increase the activity of learning and student achievement SMP Negeri 1 Lingsar class VII-1 of the school year 2012/2013

Scientific Reasoning Ability of Prospective Student Teacher in the Excellence Program of Mathematics and Science Teacher Education in University of Mataram

The purpose of this study is to investigate the scientific reasoning ability of the prospective student teacher, and to analyze the difference in scientific reasoning ability between students in the study programs. The sample set consisted of 179 students joining the Excellence Program of Mathematics and Science Teacher Education in the Faculty of Teacher Education (FTE) in the University of Mataram. The Classroom Test of Scientific Reasoning (CTSR) was translated into Indonesian language and used to measure the student scientific reasoning ability. The results of this study revealed that 95.5% students had low reasoning ability and were categorized as concrete and transitional reasoner. Only few students (4.5%) reached the category of formal operational reasoner. In addition, significant differences of the students reasoning ability emerged among the third and the fifth semester students, as well as students in the four study programs