This research aims to describe the level of college students’ academic procrastination, analyze differences in academic procrastination among the college students, and analyze the relationship between academic procrastination and academic achievement. This research uses a quantitative method with a survey and correlational design. The research population is 620 Sekolah Tinggi Keguruan dan Ilmu Pendidikan Singkawang (STKIP) Singkawang college students. The sample is taken using a simple random sampling technique as many as 352 college students (76 male and 276 female). The instrument used in data collection is the academic procrastination scale and great point academic. The data are analyzed using descriptive analysis, ANOVA, and correlation. The findings show that college students’ academic procrastination is at a moderate level which is dominated by time management skill indicators. Male students and students who are in the middle years have higher levels of academic procrastination. Intercorrelation shows a significant but negative relationship between academic procrastination and academic achievement.Abstrak: Tujuan penelitian ini adalah mendeskripsikan tingkat prokrastinasi akademik mahasiswa, menganalisis perbedaan prokrastinasi akademik mahasiswa, dan menganalisis hubungan antara prokrastinasi akademik dengan prestasi akademik mahasiswa. Penelitian ini menggunakan metode kuantitatif dengan desain survei dan korelasi. Populasi penelitian adalah 620 mahasiswa STKIP Singkawang. Sampel diambil dengan teknik simple random sampling sebanyak 352 mahasiswa (76 laki-laki dan 276 perempuan). Instrumen yang digunakan dalam pengumpulan data adalah skala prokrastinasi akademik dan indeks prestasi akademik. Data dianalisis menggunakan analisis deskriptif, ANOVA, dan korelasi. Hasil penelitian menunjukkan bahwa prokrastinasi akademik mahasiswa berada pada tingkat sedang yang didominasi oleh indikator keterampilan mengatur waktu. Mahasiswa laki-laki dan mahasiswa yang berada di tahun pertengahan memiliki tingkat prokrastinasi akademik yang lebih tinggi. Interkorelasi menunjukkan adanya hubungan negatif yang signifikan antara prokrastinasi akademik dengan prestasi akademik.

The understanding of mathematical concepts has an important role in one of the knowledge and activity skills in mathematics learning according to NCTM. On the other hand, self-regulated learning is one aspect that also determines the success of students' mathematics learning. Facts in the field, the understanding of concepts, and self-regulated learning students' are still low. Based on this, the need for contextual learning and the existence of teaching aids in learning mathematics. The purpose of this study is to find out the increase in understanding of the concept, the effect of self-regulated learning toward the understanding of concepts, and describe the understanding of the concept. This research is a mixed-method with a combination model used in Sequential Explanatory Design. The subjects were fourth-grade elementary school students in the city of Singkawang. In the qualitative part, taking the subject is to randomly select 1 student from the criteria of understanding the concepts that arise. Data collection instruments used were tests and questionnaires. The data analysis technique used is the scoring, N-Gain test, simple regression test, and quantitative descriptive. The results of this study showed: (1) there is an increase in understanding of concepts in RME learning assisted by PANDU; (2) there is a significant influence between self-regulated learning and the understanding of concepts in RME learning assisted by PANDU, and (3) the understanding of concepts in learning RME assisted by PANDU has an average of 79.63.

Many factors cause low student scientific literacy, one of which is due to the inappropriate use of the selected learning media in the learning process. This study aims to produce ethnoscience-based digital pocketbooks that are feasible and attractive to use by students and are effective in improving students' scientific literacy. The ADDIE model research procedure used includes five stages, namely: Analysis, Design, Development, Implementation, and Evaluation. The sample consisted of 141 fifth grade students in three Singkawang City Public Elementary Schools. Data collection techniques in the form of interviews, validation, questionnaires, and scientific literacy tests. Based on the results of the analysis stage, it was found that the KI and KD were related to cultural elements and local wisdom of the city of Singkawang. The design stage is obtained by designing a book framework, presentation of material, instruments. The development stage obtained material, graphic, and linguistic feasibility. Phase I validation was 3.25 with a percentage of 81.41% and stage II was 3.72 with an eligibility percentage of 92.92%. The results of the practitioner validator were 3.8 with a percentage of 95% and were classified as valid. Implementation stage, validation of the attractiveness of student and student responses to linguistic aspects of 3.31 and 3.46, respectively. While the material and graphic aspects of the student's response have a value of 3.23 and 3.22 respectively in the attractive criteria and student responses have a value of 3.33 and 3.39 respectively in the very interesting category. This means that ethnoscience-based digital pocketbooks are generally feasible, easy to understand, and interesting to use because they have a new display concept that is coherently integrated with local culture and a design that is in line with developments. Students' scientific literacy skills increased with an effect size value of 0.621 with moderate criteria at 73% presentation. It can be concluded that ethnoscience-based digital pocketbooks can effectively improve students' scientific literacy skills.