Penelitian  ini bertujuan untuk menghasilkan produk  Lembar Kerja Peserta Didik (LKPD) berbasis Etnomatematika yang berkualitas baik pada materi Segiempat dan Segitiga.  Untuk mengetahui kualitas dari LKPD yang dihasilkan dilihat dari tiga aspek yaitu kevalidan, kepraktisan dan keefektifan. Metode yang digunakan dalam penelitian ini yaitu research and development(R&D) dengan model pengembangan four-D(4-D) yang dimodifikasi menjadi 3D tahap yaitu define, design, dan develop. Instrumen yang digunakan untuk mengukur kualitas LKPD yaitu angket lembar validasi untuk mengukur kevalidan, wawancara, angket respon guru dan respon peserta didik untuk mengukur kepraktisan, dan tes untuk mengukur keefektifan.Hasil dari penelitian ini menunjukkan kualitas LKPD memenuhi kriteria kevalidan dengan skor rata – rata keseluruhan sebesar 4,8 dan kualitas LKPD memenuhi kriteria kepraktisan dengan skor rata – rata keseluruhan sebesar 4,73 sertapersentase ketuntasan tes peserta didik sebesar 77,7 % memenuhi kriteria keefeektifan.Dengan demikian Pengembangan LKPD berbasis Etnomatematika pada materi segiempat dan segitiga berkualitas baik dan dapat digunakan dalam pembelajaran matematika.

This study aims to determine the effect of self-efficacy and teacher social support on mathematics learning achievement of class VII students of one of the Private SMP in Kupang city social arithmetic material. The type of research used is quantitative with the statistical analysis used in this study, namely multiple regression analysis. The sample in this study is class VII A, amounting to 25 people randomly selected from 4 existing classes. The type of data in this research is primary data with data collection used, namely questionnaires and achievement test questions. Technical data analysis in this study used multiple regression analysis. Based on the partial test results on self efficacy showed that  = 3.164> 1.71 = , teacher social support obtained  = 2.954> 1.71 = , then with a significant level of 5% there is a partial effect on self-efficacy and social support teacher. Furthermore, the simultaneous test shows that = 55,176 and at a significant level of 5% which means that  = 55,176 > 3,44 = , then there is a simultaneous influence on teacher self-efficacy and social support . So, it was found that self-efficacy and social support of teachers had a significant influence on mathematics learning achievement both partially and simultaneously. Thus, it was concluded that there was an effect of teacher self-efficacy and social support on students' mathematics learning achievement. The coefficient of determination (R Square) = 0.834. This means that 83.40% of the variation in mathematics learning achievement can be explained by variations in the two variables, namely self-efficacy and teacher social support. Meanwhile, 16.60% is influenced by other variables.

Abstrak. Penelitian ini bertujuan untuk mendeskripsikan kemampuan mahasiswa dalam menyelesaikan masalah matematis berorientasi Higher Order Thinking Skills (HOTS) tingkat Sekolah Menengah. Metode penelitian adalah kualitatif dengan subjek sebanyak 20 mahasiswa. Data berupa hasil tes dan wawancara dianalisis secara kualitatif. Pertama, peneliti menganalisis data hasil tes dan mendeskripsikan kemampuan para mahasiswa dalam menyelesaikan masalah matematis berorientasi HOTS tingkat Sekolah Menengah. Kemudian, peneliti memilih satu mahasiswa berkemampuan tinggi, satu mahasiswa berkemampuan sedang, dan satu mahasiswa berkemampuan rendah secara purposive dan menganalisisnya secara kualitatif. Hasil penelitian menunjukkan bahwa para mahasiswa mampu memecahkan masalah: (1) bilangan dan operasinya dan (2) aljabar, namun mengalami kesulitan dalam memecahkan masalah: (1) geometri, (2) analisis data, dan (3) probabilitas. Hanya mahasiswa berkemampuan tinggi yang mampu bekerja dengan geometri dan memecahkan masalah analisis data. Kesulitan ini disebabkan masih rendahnya kemampuan visual spasial dan kemampuan mencipta para mahasiswa. Berkaitan dengan taksonomi Bloom, kemampuan para mahasiswa pada umumnya masih berada pada kategori menganalisis masalah.

The research objective is to explore the mathematical connection capabilities of hearing-impaired students in grade 8 in completing tests related to connection with other disciplines. The type of research used is qualitative research with a case study design. The number of subjects in the study was six people who were taken purposively based on the characteristics of language and speech, intelligence, and social-emotional spread in 3 schools namely; SLB B KaryaMurni of Ruteng - East Nusa Tenggara (NTT), State SMPLB Semarang and SLB B Don BoscoWonosobo. The results of the analysis of work and interviews found that mathematical connection abilities that arise in hearing impaired students in completing tests related to connection with other disciplines include; (1) in building an understanding of the problem, hearing impaired students tend to represent problems by making pictures. (2) in making a preliminary plan to complete, the students are inclined to use the media related to the problem given. (3) if hearing impaired students can find patterns by seeing regularity, then in determining these patterns they tend to use the results of exploration by making pictures. Thus concluded that hearing impaired students can solve non-routine questions with a high level of difficulty by using the patterns found by first exploring through images.

This study aims to determine the effect of students' mathematical dispositions on mathematical problem solving abilities of students in class VII of SMP. The type of research used is quantitative. The sample in this study was class VII A, amounting to 30 people who were selected using simple random sampling from 6 existing classes. The type of data in this research is primary data with data collection used using a disposition questionnaire consisting of 28 items and tests consisting of 5 items of description. Testing the hypothesis in this study using a simple regression test. After the data is analyzed the regression equation is obtained as follows: Y = 16,312 + 0.523X. before testing the hypothesis, the data normality test and linearity test were carried out. Based on the data analysis, it was found that the t-test = 3.296 with significance = 0.003 and table = 2.048. then t count = 3.296> 2.048 = t table means that data is normally distributed. To see the achievement of the disposition indicators of junior high school students in the junior high school class, the average of each indicator is calculated and the achievement of the mathematical disposition indicator is 50.08%. Whereas for grouping mathematical dispositions, problem solving abilities obtained the highest dispositions having an average of 63.04, moderate dispositions having an average of 43.56, and low dispositions having an average of 40.51. Thus, it can be concluded that there is an influence of mathematical disposition on mathematical problem solving abilities of students of junior high school class.