This study aims to determine the profile of cognitive ability. The research method used descriptive quantitative. The research subjects are 50 eleventh graders from two high schools in Bandung. The research instrument used multiple choice questions with five options to measure cognitive ability and essay questions for 4 of 5 critical thinking skill's indicators by Ennis's. This study uses descriptive analysis techniques based on the percentage of cognitive abilities and critical thinking skill. The results showed on cognitive ability, 62.00% of students are able in C1 cognitive domain; 31.30% are able in cognitive domain C2; 21.30% are able in C3 cognitive domain; 25.00% are able in C4 cognitive domain; And on critical thinking skill, that is; 28.00% of students are able to identify stated reasons; 10.67% are able to agreement among sources; 11.33% are able to inter explanatory conclussions and hypotheses; And 6.00% are able to select criteria to judge possible solutions. The implication is, student's cognitive ability and critical thinking skill are still low, so there must be an effort to improve them through learning innovations. Keywords: cognitive ability, critical thinking skill, work and energy AbstrakPenelitian ini bertujuan untuk mengetahui profil kemampuan kognitif dan keterampilan berpikir kritis siswa SMA pada materi usaha dan energi. Metode penelitian yang digunakan adalah deskriptif kuantitatif. Subjek penelitian sebanyak 50 siswa kelas XI dari dua Sekolah Menengah Atas di Kota Bandung. Instrumen penelitian menggunakan soal pilihan ganda dengan lima option untuk mengukur kemampuan kognitif dan soal uraian untuk mengukur 4 dari 5 indikator keterampilan berpikir kritis yang dikemukakan oleh Ennis. Analisis data menggunakan teknik analisis deskriptif berdasarkan persentase kemampuan kognitif dan keterampilan berpikir kritis siswa. Hasil penelitian menunjukkan bahwa pada kemampuan kogitif, 62,00% siswa mampu dalam ranah kognitif C1; 31,30% siswa mampu dalam ranah kognitif C2; 21,30% siswa mampu dalam ranah kognitif C3; 25,00% siswa mampu dalam ranah kognitif C4; dan pada keterampilan berpikir kritis siswa yaitu, 28,00% siswa mampu dalam indikator mengidentifikasi alasan yang dinyatakan; 10,67% siswa mampu dalam indikator persetujuan di antara sumber; 11,33% siswa mampu dalam indikator menyimpulkan penjelasan, kesimpulan, dan hipotesis; serta 6,00% siswa mampu dalam indikator memilih kriteria untuk mempertimbangkan solusi yang mungkin. Implikasinya, kemampuan kognitif dan keterampilan berpikir kritis siswa masih tergolong rendah, sehingga harus ada upaya untuk meningkatkannya melalui inovasi-inovasi pembelajaran.Kata-kata Kunci: kemampuan kognitif, keterampilan berpikir kritis, usaha dan energi Naskah diterima: 7

Statistical Reasoning is the ability to understand information in daily life based on statistical data. This study aims to determine the ability of student statistical reasoning based on 5 levels of statistical reasoning models. The research subjects are two classes of first semester students majoring in Communication Sciences. The data collected is in the form of statistical reasoning test result. The data are categorized into five namely Level 1 (Idiosyncratic reasoning), level 2 (Verbal reasoning), level 3 (Transitional reasoning), level 4 (Procedural reasoning) and level 5 (Integrated process reasoning). Next, look at the percentage of student statistical reasoning included in the level 1, level 2, level 3, level 4 and level 5 categories. The results of data analysis showed that students level 3 with statistical reasoning were far more numerous than students’ statistical reasoning abilities categorized as than on the other.

Indonesia is ranked 56th out of 65 participating countries in the Program for International Student Assessment (PISA) based on data 2015. According to PISA results, the average science score of Indonesian students is 403, where this number is categorized as low. This is because students are still in the process of understanding and have not yet fully recognized the location of their mistakes. Students can diagnose the location of their mistakes through self-diagnosis activities. Self-diagnosis activities require the active role of students during the learning process. One approach that can increase the active role of students is STEM (Science Technology Engineering Mathematics). However, research at this time is still rarely found self-diagnosis activities that are applied to the STEM approach. Therefore, this research has the aim to find out the increase in mastery of physical concepts and self-diagnosis of students on the STEM learning approach to the theory of poscal law class XI High School.This study uses a One-Group pretest-posttest design with a sample of 30 ini 11th grade highschool from one schools in Bandung. . Based on the findings, there is an increase in mastery of concepts [<g> = 0.51] from pre-test to post-test. In self-diagnosis activities identified that there are differences in scores [z = 1.75; p = 0.9599] student assessment results of researchers and self-scoring results. Deeper self-diagnosis triggers a series of implicit steps that encourage them to rearrange their cognition by correcting the mistakes they make when solving problems. So that learning activities using the STEM approach that involves self-diagnosis activities can improve students' mastery of concepts.

Penelitian ini dilatar belakangi oleh tidak maksimalnya pembelajaran fisika dengan pendekatan multirepresentasi yang diterapkan di SMA Negeri 15 Bandung. Tujuan penelitian ini adalah untuk menganalisis pengaruh signifikan model pembelajaran inkuiri terbimbing dengan pendekatan multirepresentasi terhadap peningkatan penguasaan konsep fisika siswa. Metode penelitian yang digunakan adalah preexperimental design dengan desain eksperimen one group pretest-posttest design. Sampel dalam penelitian ini adalah siswa-siswi kelas XI MIPA 5 di SMA Negeri 15 Bandung sebanyak 28 orang siswa. Pengumpulan data dilakukan menggunakan tes, dan lembar observasi keterlaksanaan pembelajaran. Hasil penelitian menunjukkan bahwa terdapat pengaruh signifikan model pembelajaran inkuiri terbimbing dengan pendekatan multirepresentasi terhadap peningkatan penguasaan konsep yaitu dengan hasil uji t paired menunjukkan nilai t hitung absolut sebesar 24,836, yang berarti thitung > ttabel, dengan nilai t tabel yang memiliki signifikasi 5% sebesar 2,052. Hal ini berarti terdapat pengaruh signifikan model pembelajaran inkuiri terbimbing dengan pendekatan multirepresentasi terhadap peningkatan penguasaan konsep fisika siswa SMA.