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The concept of mathematical material is still not fully embedded in students' schemes, this means that errors occur in constructing the concept. This research aims to describe the actual situation regarding pseudo-construction errors that occur at the APOS (Action, Process, Object, and Scheme) stages. This research involved 28 students in class VIII A of SMPN 2 Silo Jember as subjects through problem solving test to get an comprehensive information about occuring errors. Then by the purposive sampling and snowball sampling techniques, two subjects are choosen to explore in depth through interview. The data valiadation is guarantee through the member check process. Data analysis includie data condensation, data presentation, and concluding. The results of the research are that pseudo-construction errors occur at every stage of APOS which results in the concept not being fully constructed in the student's scheme. As a recommendation, developing a mathematics learning model based on APOS theory to minimize the error is needed such that the concepts will be well and completely constructed in students' schemes. Konsep materi matematika masih belum sepenuhnya tertanam dalam skema siswa. Hal ini menunjukkan bahwa terjadi kesalahan dalam mengkonstruk konsep. Penelitian ini bertujuan untuk menggambarkan atau mendeskripsikan keadaan yang sebenarnya terkait kesalahan konstruksi semu yang terjadi pada tahapan APOS (Aksi, Proses, Objek, dan Skema). Penelitian ini melibatkan 28 siswa kelas VIII A SMPN 2 Silo Jember sebagai subjek melalui tes pemecahan masalah untuk mendapatkan informasi komprehensif tentang kesalahan yang terjadi. Kemudian dengan teknik purposive sampling dan snowball sampling, dipilih dua subjek untuk dieksplorasi secara mendalam melalui wawancara. Validasi data dijamin melalui proses member check. Analisis data meliputi kondensasi data, penyajian data, dan penarikan kesimpulan. Hasil penelitian yaitu kesalahan konstruksi semu terjadi disetiap tahapan APOS yang mengakibatkan konsep tidak terkonstruk dengan utuh dalam skema siswa. Sebagai rekomendasi, perlu dikembangkan model pembelajaran matematika berbasis teori APOS untuk meminimalkan kesalahan agar konsep-konsep dapat terkonstruksi dengan baik dan lengkap dalam skema siswa.

Numeracy is a person's ability to implement mathematics in the home, work and community environments. This research aims to measure the practicality and effectiveness of using E-LKPD in a socio-cultural context assisted by GeoGebra workbooks in improving students' numeracy skills in pyramid material. The type of research used was a quasi-experiment (Quasi-experiment) with research subjects 21 class VIII students at SMPN 1 Kalisat Jember. The practicality of E-LKPD is assessed from the results of student response questionnaires, while the effectiveness of E-LKPD is assessed from the results of students' numeracy ability tests. The use of E-LKPD is said to be practical if the average percentage of students' questionnaire responses is at least in the practical category, and effective if students' numeracy skills are at least in the medium category. Based on the practicality analysis, the results of the student response questionnaire regarding the use of E-LKPD obtained a percentage of 81.67% or were in the practical category. In addition, the use of E-LKPD shows an increase in students' numeracy skills on all numeracy indicators. This can be seen based on the results of the numeracy ability test which obtained an N-Gain score of 0.51 or at a medium effectiveness level. Therefore, the use of E-LKPD in a socio-cultural context with the help of GeoGebra workbooks is practical and effective for improving students' numeracy skills, especially in learning surface area and volume of pyramids.

Abstrak Tujuan. penelitian. ini yaitu untuk mengembangkan perangkat pembelajaran matematika berbasis. hybrid-caring community yang valid, praktis. dan efektif. yang terdiri dari rencana pelaksanaan pembelajaran (RPP), lembar kerja. peserta didik. (LKPD) dan tes. hasil belajar. (THB) dan menguji.dampaknya terhadap kemampuan koneksi matematika pada materi sistem persamaan linier dua variabel (SPLDV). Metode penelitian ini menggunakan.  metode penelitian. pengembangan (R&D) dilanjutkan. penelitian. eksperimen. Teknik pengumpulan data dalam penelitian ini menggunakan observasi aktivitas siswa, angket respon siswa dan tes hasil belajar untuk mengetahui kemampuan koneksi matematika siswa. Hasilvalidasi RPP, LKPD, dan THB memenuhi kriteria valid. Kepraktisan perangkat dibuktikan dari hasil observasi pelaksanaan perangkat. pembelajaran kategori. “sangat. praktis†dengan persentase.  96%. Kriteria. Keefektifan. perangkat. pembelajaran. dilihat. dari skor lembar observasi. aktivitas peserta. didik, angket respon peserta didik, dan ketuntasan. THB. yang memenuhi kriteria efektif. Berdasarkan t-test pada penelitian eksperimen, dihasilkan perangkat pembelajaran matematika berbasis hybrid-caring community materi SPLDV memiliki pengaruh yang signifikan terhadap kemampuan. koneksi. matematika. Abstract The purpose of this research is to develop valid, practical and effective hybrid-caring community-based mathematics learning tools consisting of learning implementation. plans, student worksheets and learning achievement tests. and test their impact on connection ability. mathematics on the material system. of two-variable. linear equations. This research method uses development. research followed by experimental. research. Data collection techniques in this study used observation of student activities, student response questionnaires and learning achievement tests to determine students' mathematical connection abilities. Learning. implementation. plans, student. worksheets and learning achievement tests validation results meet the valid criteria. The practicality of the device is proven from the results of observing the implementation of the learning device in the "very practical" category with a percentage of 96%. The criteria for the effectiveness of the learning device can be seen from the score of the student activity observation sheet, the student response questionnaire, and the completeness of the learning achievement tests. which meets the criteria for being effective. Based on the t-test in experimental research, a hybrid-caring community-based mathematics learning tool produced by system. of two-variable. linear equations material has a significant influence on mathematical connection abilities

Learning mathematics is frequently regarded as difficult by students, resulting in a lack of problem-solving ability. This problem occurred at SMPN 8 Jember, where, based on the results of observations, grade VII students have low problem-solving skills due to the conventional learning model used. If the problem is not addressed immediately, it is feared that it will continue with the next generation of students. This study aims to determine the effectiveness of PBL model of the peer tutor method assisted by card problems on mathematics learning outcomes in seventh-grade junior high school students with quadrilateral material. This research includes a quasi-experimental design. The data collection technique uses pretest and posttest tests to be tested with the paired samples T test and regression test (ANOVA) on the SPSS application. The results of the paired samples T test in the experimental class gave a sig value of 0.000, while in the control class it was 0.003. The sig value for the regression test for the experimental class is 0.014, while the sig value for the control class is 0.033. These results show that the PBL model of the peer tutor method assisted by card problems is more effective and influential than the PBL model of the peer tutor method to improve student mathematics learning outcomes. The study concludes that incorporating card problem learning media into the PBL model of the peer tutor method produces effective results in terms of quadrilateral material mathematics learning outcomes.

Abstrak Penelitian ini didasari oleh rendahnya kemampuan siswa dalam menyelesaikan masalah matematika. Berdasarkan hal tersebut, tujuan dalam penelitian ini untuk mengembangkan model pembelajaran Problem Based Cooperative Learning (PBCL) beserta perangkatnya yang terdiri dari RPP, LKS, dan THB yang valid, praktis, dan efektif kemudian menguji pengaruhnya terhadap kemampuan pemecahan masalah matematika siswa SMP. PBCL adalah hasil modifikasi sintaks PBL dan Cooperative Learning. Adapun sintaks model pembelajaran PBCL adalah mengorientasikan siswa pada masalah, mengorganisasikan siswa ke dalam kelompok-kelompok belajar, mengorganisasikan siswa untuk belajar, membimbing kelompok bekerja dan belajar, menganalisis dan mengevaluasi proses pemecahan masalah, dan memberi penghargaan. Penelitian ini menggunakan penelitian pengembangan dan dilanjutkan dengan penelitian eksperimen. Teknik pengumpulan data dalam penelitian ini adalah wawancara, observasi aktivitas siswa, observasi keterlaksanaan model dan perangkat pembelajaran, angket respon siswa, dan tes kemampuan pemecahan masalah. Hasil penelitian menunjukkan model pembelajaran PBCL beserta perangkatnya memenuhi kriteria sangat valid, praktis, dan efektif. Kepraktisan diperoleh dari hasil observasi keterlaksanaan model dan perangkat pembelajaran. Berdasarkan dari uji t-test diperoleh hasil bahwa terdapat pengaruh yang signifikan model pembelajaran PBCL materi persamaan garis terhadap kemampuan pemecahan masalah matematika siswa. Abstract This study is based on the lack of students ability in solving mathematical problem. According to that background, this study is aimed to develop a learning model of Problem Based Cooperative Learning (PBCL) along with the learning kits, RPP, LKS, and THB, in a valid, practical, and effective problem solving format, and to examine its effectiveness towards junior high school students’ ability to solve mathemathical problmes. PBCL is a syntax modification result of PBL and Cooperative learning, itself is orienting students on problem, organizing students into learning groups, organizing students for learning, guiding for working and learning group, analyzing and evaluating problem solving process, and giving appreciation. This study used developing research continued by experiment research. The data collection techniques were an interview, student activity observation, the implementation of a learning model and kit observation, a student response form, and a problem solving ability test. The result of this study showed that the learning model and kits of PBCL fulfill the criteria of being very valid, practical, and effective. According to the T-test experiment, it can be concluded that there is a significant influence of the PBCL learning model on students’ ability to solve mathematical problems.

The purpose of this research is to develop a valid, practical, and effective interactive learning media assisted by GeoGebra. This study used the Thiagarajan (4-D) model which includes four stages, namely defining, designing, developing, and disseminating. The process of the four stages produced an interactive GeoGebra learning media, so students can explore practice questions related to inequalities material independently. The research subjects selected were students of class X Science 2 SMAN Arjasa Jember. The result of this development is a valid interactive learning media assisted by GeoGebra with a very high level of validity, included as practical criteria based on students' scores as media users, and is proven to be effective in improving students' mathematical literacy skills based on the N-Gain from the average pretest and posttest. This interactive learning media assisted by GeoGebra received positive responses from students as an interesting media that support students to understand the material during their sudy.

Penelitian ini mempunyai maksud yakni memahami efektifnya aktivitas belajar mengajar dengan model discovery berbantuan GeoGebra dilihat dari kemampuan berfikir kreatif matematika murid. Metode dari penelitian yang dipilih ialah kuantitatif. murid kelas XI SMKN 6 Jember menjadi populasi dalam penelitian. Sampel pada penelitian diambil melalui cara acak yang terdiri dari kelas kontrol serta eksperimen dengan memakai metode cluster random sampling. Data penelitian ialah instrumen berupa pre-test serta post-test untuk memahami kemampuan berfikir kreatif matematika murid. Desain penelitian ialah penelitian kuasi eksperimen, dengan tehnik analisa data yang dipakai ialah uji parametik yakni independent sample t-test. Penelitian mendapatkan hasil jika kemampuan murid meningkat sesudah mengikuti aktivitas belajar mengajar dengan model discovery berbantuan geogebra. Hasil dari nilai post-test dalam kelas ekserimen lebih tinggi dibanding hasil nilai post-test dalam kelas kontrol serta rata-rata nilai N-Gain score dalam kelas eksperimen senilai 68.8% dikategorikan cukup efektif. Dalam kelas kontrol senilai 42.8% dikategorikan kurang efektif. Sehingga bisa diambil simpulan jika aktivitas belajar mengajar dengan model discovery berbantuan GeoGebra efektif dalam peningkatan kemampuan berfikir kreatif murid materi transformasi geometri refleksi. In this study, we will determine GeoGebra-assisted effectiveness discovery teaching and learning activities model in terms of students' creative thinking skills, which integrates the quantitative methods. The research population are class XI students at SMKN 6 Jember, divided into control and experimental class. Sampling using cluster random sampling method. The study data are instruments in the form of post-test and pre-test to determine student creative thinking ability in mathematics. The study results indicate an increase in students using GeoGebra-assisted discovery learning models. The post-test result in the experimental class is greater than the post-test result in the control class. The research design is a quasi-experimental, with data analysis techniques using parametric independent sample t-test. The results of the analysis show that the average N-Gain value in the test class is 68.8%, entered in the category is quite effective. For comparison, the average N-Gain value in the control class is 42.8% which is categorized as less effective. It implies that the implementation of discovery teaching and learning model using GeoGebra effective to improve the students' creative thinking skill on the reflection geometry transformation material.

This research is meant to develop innovative teaching equipment which able to improve as well as conserve the culture through Mathematics learning. Learning equipment which is developed are in the form of students’ book and LKS (Student’s Work Book) of Mathematics subject of VIIth grade concerning with the culture of Javanese and Maduries who lives in Jember district. This developmental study is planned in three steos, namely; theorethical study and needs analysis, formulation of learning equipments, as well as testing the equipments and eksperiment. The Model used in this research is developmental model of ADDIE, which divided into 5 phases, namely; Analysing, Designing, Developing, Implementing and Evalualing. The subject of this research are three students of VII grade of SMP (Junior High School). The product of this research is students book which based on Javanese and Maduries culture. The result of this research shows that students’ learning test in Squares subject based on Javanese and Maduries culture are good, with rate of 83,33. It can be conclude that students’ book of VII SMP which based on Javanese and Maduries culture in Squares Shapes material are effective to be used in teaching.

Mata kuliah Kalkulus I merupakan salah satu mata kuliah wajib yang harus ditempuh di program studi matematika. Pengembangan LKM yang berbasis masalah melalui Self Regulated Learningdiharapkan aktivitas mahasiswa dalam perkuliahan Kalkulus I akan meningkat. Subyek penelitian adalah 35 mahasiswa yang menempuh mata kuliah Kalkulus I Program Studi Pendidikan Matematika tahun akademik 2013/2014. Langkah awal yaitu: Mengkaji karakteristik pembelajaran mata kuliah Kalkulus I di FKIP Universitas Jember, Mengkaji masalah peserta didik dalam pembelajaran, Mengkaji kompetensi yang harus dimiliki peserta didikselanjutnya mendesain perangkat pembelajaran yaitu mengembangkan LKM. Dari hasil pengembangan LKM yang berbasis masalah melalui Self Regulated Learning diperoleh aktivitas mahasiswa sangat tinggi. Mahasiswa lebih banyak mengeluarkan ide/pendapat, berani bertanya, mau menganalisis dan menyelesaikan masalah.