This research aims to develop learning tools of mathematics junior high school with a contextual approach as a tool for learning mathematics. The subjects are 34 students in the eighth grade of junior high school. The research method used is development research by referring to ADDIE development model which consists of five stages, namely analysis, design, development, implementation, and evaluation. The instruments are validation sheets of student worksheet, questionnaires, and test results. Results of this research are: (1) the validation result of student worksheet is in very good category; (2) the result of a questionnaire of student response is in very good category; and (3) the result of the student's learning test is in a good category. So that, student worksheet is feasible from the aspect of validity, practicality, and effectiveness.

Kemampuan representasi matematis merupakan kemampuan dalam membuat suatu model dari suatu masalah ke dalam bentuk baru baik secara verbal, tulisan, tabel, ataupun grafik. Jenis penelitian ini adalah penelitian deskriptif kualitatif yang bertujuan untuk menggambarkan secara sistematis mengenai kemampuan representasi matematis. Teknik pengambilan data pada penelitian ini dilakukan dengan menggunakan tes berupa soal uraian, soal diberikan kepada siswa kelas IX di salah satu SMP Negeri yang berada di Kota Cimahi dengan jumlah 37 siswa. Hasil penelitian menunjukkan bahwa kemampuan representasi matematis siswa pada materi kekongruenan dan kesebangunan untuk indikator kata-kata atau teks berada pada kualifikasi kurang dengan persentase rata-rata skor siswa 43%. Indikator representasi visual termasuk kualifikasi cukup dengan persentase rata-rata skor siswa 60%. Pada indikator persamaan atau ekspresi matematis termasuk kualifikasi sangat kurang dengan persentase rata-rata skor 34,75%. Kesulitan yang dihadapi siswa dominan terdapat pada soal nomor 2b, 4b dengan jenis soal yang mengandung indikator kata-kata atau teks dan soal nomor 4c dengan indikator persamaan atau ekspresi matematis.

This study is experimental research that aims to know and examine in depth about the influence of AQ of pre-service mathematics teacher toward the achievement of mathematical creative reasoning ability. The population of this study is the pre-service mathematics teacher in Cimahi City, West Java, Indonesia; while the sample is 60 pre-service mathematics teachers selected purposively. The instruments of this study are tests and non-tests. They are based on the assessment of good characteristics towards students' mathematical creative reasoning abilities, while the non-test instrument is based on the assessment of good characteristics towards AQ. The results of this research show that: (1) AQ gives positive influence to the development of mathematical creative reasoning ability of pre-service mathematics teacher with the influence of 60.9%, while the rest of it (39.1%) is influenced by other factors outside AQ; (2) The mathematical creative reasoning ability of the prospective teacher students is more develop in AQ Climber type, whereas students who have Camper and Quitter AQ types still tend to have thinking patterns in solving problems with imitative reasoning; (3) Students belonging to the Quitter AQ type still tend to have errors related to the idea of solving problems and mathematical expressions.

Penelitian ini bertujuan menelaah peranan pembelajaran open-ended dan tingkat kemampuan awal statistik matematis mahasiswa terhadap pencapaian kemampuan penalaran statistik dan kemampuan berpikir kreatif matematis ditinjau secara keseluruhan dan pada tingkat kemampuan awal statistik matematik siswa (Tinggi, Sedang, Rendah). Berdasarkan hasil temuan dicari asosiasi kemampuan penalaran statistik matematis dan kemampuan berpikir kreatif matematis mahasiswa jurusan matematika di kota Cimahi. Penelitian ini merupakan penelitian eksperimen dengan desain kelompok kontrol dan postes. Populasi dalam penelitian ini adalah  seluruh  mahasiswa  jurusan  matematika di Kota Cimahi, sampelnya adalah mahasiswa semester dua dari salah  satu  perguruan tinggi di  Kota  Cimahi dan dipilih  dua kelas mahasiswa semester dua secara acak kelas yang ada. Tes kemampuan penalaran statistik, berpikir kreatif dan reflektif matematis mahasiswa masing-masing disusun mengacu pada kemampuan penalaran statistik matematis dan berpikir kreatif matematis serta  pedoman  penyususunan  tes  yang  baik.  Hasil penelitian menunjukkan bahwa (1) Kemampuan   penalaran   statistik   matematis  m a h a siswa    yang    memperoleh   pendekatan pembelajaran  open-ended  lebih  baik  daripada  yang  memperoleh  pembelajaran biasa. (2) Terdapat perbedaan yang signifikan kemampuan penalaran statistik matematis mahasiswa pada ketiga kategori TKASM (baik, sedang dan kurang) pada taraf signifikansi 5%. (3) Kemampuan berpikir kreatif matematis m a h a siswa yang memperoleh pendekatan pembelajaran open-ended  lebih  baik  daripada  yang  memperoleh  pembelajaran biasa. (4) Terdapat perbedaan yang signifikan antara kemampuan berpikir kreatif matematis mahasiswa pada TKASM Tinggi terhadap TKASM Sedang pada taraf signifikansi 5%. A Comparison of Statistics Learning Through CTL and Problem-Posing Approach in Terms of Learning Achievement and Interest in Learning Mathematics AbstractThis research aim s to describe the effectiveness of statistics learning through the CTL approach and problem posing approach in terms of learning achievement and interest in learning mathematics and to investigate which approach is more effective in learning mathematics for Vocational School students. This research is a quasi-experimental research using the pretest-posttest non-equivalent group design. The research population comprised all year XI students of SMK Negeri 5 Yogyakarta. From the population, two classes were randomly selected as the research sample. To test the effectiveness of statistics learning through the CTL and problem-posing approach, one sample t-test was used in the aspect of learning achievement and a proportion test on the aspect of interest in learning. The data were analyzed using the T2Hotelling’s test to compare the effectiveness of the CTL approach and problem-posing approach. If differences in effectiveness were found, then further study of t-univariate was done to determine certain variables that contributed to the overall difference. The results show that: (1) statistics learning through the CTL approach is effective in terms of learning achievement; (2) There is a significant difference of students' mathematical statistical reasoning ability in the three categories of TKASM (good, medium and low) at significance level of 5%. (3) The ability of students' mathematical creative thinking to get an open-ended learning approach is better than those who get regular learning. (4) There is a significant difference between students' mathematical creative thinking ability in TKASM Tinggi to TKASM Sedang at the level of significance of 5%.

Penelitian yang telah dilakukan oleh beberapa peneliti sebelumnya menunjukkan bahwa kemandirian belajar siswa masih rendah. Rendahnya kemandirian belajar disebabkan oleh beberapa faktor, salah satunya kemampuan siswa itu sendiri. Tujuan penelitian ini adalah untuk mengetahui pengaruh kemandirian belajar terhadap kemampuan pemecahan masalah matematis siswa. Populasi dari penelitian ini adalah 27 siswa SMP di Kabupaten Cianjur. Penelitian ini menggunakan pendekatan deskriptif kualitatif dengan metode korelasi. Penelitian diawali dengan memberikan tes berupa instrumen soal kemampuan pemecahan masalah dan angket yang dapat mengukur kemandirian belajar siswa. Selanjutnya, peneliti melakukan wawancara dengan guru. Hasil yang diperoleh menunjukkan bahwa siswa memiliki kemandirian belajar dan kemampuan pemecahan masalah matematis yang baik. Hal tersebut diperkuat dengan hasil uji korelasi 0,808. Angka tersebut menunjukkan pengaruh yang sangat kuat. Kata Kunci: kemandirian belajar, kemampuan pemecahan masalah.                                                                                                                                                                             ABSTRACT                             Most studies examine that the student’s independent learning is still low. This is caused by several factors. One of them is the ability of the students themselves. The purpose of this research is to know the influence of students’ learning independence to mathematical problem solving ability. The population of this research is 27 Junior High School students in Cianjur. This research uses qualitative descriptive method. The study begins with having the students to do the problem-solving test and fill in the student learning independence questionnaire. The data and information were also collected by interviewing teachers. The results indicate that the students have good self-regulated learning and problem solving ability. It is reinforced with test results correlation 0.808. It means that there is a very strong influence. Keywords: self-regulated learning, problem solving ability.