This study aims to determine the proportion of students' level of critical thinking skills on the subject of Impulse and Momentum, any difficulties experienced by students to reach the level of critical thinking skills, and solutions to overcome the difficulties of students achieving critical thinking skills. This research uses descriptive qualitative research methods. The subjects of this study were 27 students taken by purposive sampling technique. Data collection techniques in this study are tests of critical thinking skills, interviews, and observation. Data analysis techniques using descriptive statistics. The results showed that each student's ability, high ability students 36.84%, medium ability 34.50%, low ability 22.80% divided into two categories of KBK 2 with a percentage of 52.63% and KBK 1 with a percentage of 23, 94%. From the results of the study also obtained the achievement of students every KBK indicator. Student achievement in the Interpretation indicator of 51.58% Analysis 18.75% Evaluation 13.87% Inference 31.48% Explication 14.19% and Self Regulation 26.85%. So KBK students as a whole are in the low category with a percentage of 31.38%. The cause of students 'difficulties in fulfilling CBC indicators is the limited ability of students to formulate and find other alternatives, the completion of students' answers is difficult to draw conclusions and connect substance between materials, and has not been studied in depth so students tend to be careless in solving problems. The solution that can be used is to provide more experience to students in terms of critical thinking skills and additional learning outside school hours.

The research aims to know the influence of students studying physics by using cooperative learning model Team Assisted Individualization (TAI) type in learning physics on class X SMAN 8 Lubuklinggau the Academic Year 2016/2017. This type of research is experimental research, the research design used in the form of pre-test and post-test control group design. Data collection techniques in this research are essay test in the form of as much as seven items. The essay is to determine students’ learning outcomes in the cognitive domain. The samples were taken from class X.1  and class X.2. The average value of the experimental class in initial tests was at 40.64 and 83.41 for the final test. While the average value of the initial test in control class was at 32.16 and for the final test at 75.73. With t = 2.604 df = 48 and α = 0.05, ttable value is 1.684. So tcount> ttable, then accept and reject H0 Ha. Based on this analysis we can conclude the results of the experimental class which is learning using cooperative learning model Assisted Individualization Team (TAI) type is higher than the average value of the control class that using conventional cooperative learning.Penelitian ini bertujuan untuk mengetahui pengaruh hasil belajar fisika siswa pada ranah kognitif dengan menggunakan model pembelajaran kooperatif tipe Team Assisted Individualization (TAI) siswa kelas X SMA Negeri 8 Lubuklinggau Tahun Pelajaran 2016/2017. Jenis penelitian ini adalah penelitian eksperimen, dengan desain penelitian berbentuk pre-test dan post-test kontrol group design. Teknik pengumpulan data dalam penelitian ini adalah tes berbentuk soal essay sebanyak 7 butir soal. Kelas sampel diambil kelas X.1 dan kelas X.2. Nilai rata-rata kelas eksperimen pada tes awal sebesar 40,64 dan tes akhir sebesar 83,41. Sedangkan nilai rata-rata kelas kontrol pada tes awal sebesar 32,16 dan pada tes akhir sebesar 75,73. Dengan thitung = 2,604 dk = 48 dan α   = 0,05, maka nilai ttabel adalah 1,684. Jadi thitung> ttabel, maka terima Ha dan tolak H0. Berdasarkan analisis tersebut dapat disimpulkan ada pengaruh model pembelajaran kooperatif tipe Team Asissted Individualization (TAI) terhadap hasil belajar fisika siswa.

The purpose of this study was to find out the relationship between learning interest in learning achievement in physics of class XI students at Karang Jaya Public High School 2017/2018 Academic Year. The research method used is correlation research. The population is all class students of Karang Jaya High School 2017/2018 Academic Year totaling 103 people and as a sample 1 class is taken, namely the XIA class totaling 26 people. Data collection techniques were carried out by questionnaire technique. The magnitude of the correlation between the two variables tested (rxy) is 0.50 (medium correlation coefficient). The regression equation is Y = 42 + 0.51X. the value of b which is positive, means that interest in learning has a positive effect on student learning achievement. The results of the calculation of linearity test Fcount = 8.11 while from the F distribution table at the significance level α = 0.05 where db re g (b 1a) 1 and db res = 26 this means there is a linear relationship of learning interest with student achievement in physics learning. The results of this study indicate that there is a significant relationship between interest in learning with physics learning achievement of students of Class XI Karang Jaya Public High School 2017/2018 Academic Year. It is expected that students always train themselves to dare to appear in expressing their opinions in public places. Keywords: interest, learning achievement

This study aims to determine the learning outcomes of class XI students in Lubuklinggau 6 Model State Senior High School 2018/2019 Academic Year after using contextual-based Physics teaching material for Static Fluid students and to find out the students' response to learning using contextual learning material Static Fluid class XI students in high school Negeri 6 Lubuklinggau Model 2018/2019 Academic Year. The sample of this study consisted of 23 students of class XI IPA 4 of State Senior High School 6 Model Lubuklinggau. Data collection is done by interview techniques, questionnaires, tests, and observations. The overall percentage of teaching material components is 81.82% (very good). The percentage of student responses to contextual-based teaching materials is 79.78% (very good). In addition, from the results of daily test results, the effectiveness percentage of 86.95% (very good) of students who received scores above 70 out of 10 test items. Data analysis technique used was t-test Calculated value> t table with the value of t count = 3.69 and t table = 1.717. The results of the average percentage of students in the affective realm of 89.40% (very good) and the results of the average percentage of students in the psychomotor realm of 91.30% (very good). The percentage of student responses to learning using contextual learning is 91.07% (very good). So that the use of contextual based teaching materials can be said to be valid, practical and effective.

The purpose of this study was to see how the effect of the word square learning model on student physics learning outcomes. The population in this study were all Grade VII students of SMPIT AN-NIDA 'Lubuklinggau, which numbered 52 people. Therefore, researchers trying to use this type of research are experiments using Pretest-Posttest Control Group Design. Data collection techniques used were essay-shaped test techniques as many as 5 questions. The final test score data were analyzed using the z-test. Based on the results of data analysis zcount = 2.44 and ztabel = 1.68 because zcount> ztable, then the conclusions obtained are the effect of Word Square learning model on student learning outcomes. Keywords: Word Square, Physics Learning Outcomes.