Practicum activity is a scientific process to find out a phenomenon or validate a concept. HOT-LAB in laboratory activities is useful in improving 4C skills, including Critical Thinking Skills. The number of Modules or E-Modules that use a cookbook of guided laboratory inquiries was less to increase the 4C Skills in supporting the 21st Century skills. This study aimed to design, create and find out the effect of using HOT-LAB-based E-Modules to improve the students’ Critical Thinking Skills. The research method was the ADDIE RnD. Invalidation stage, E-Module that was validated by material and media validators, stated effective, so it was feasible to continue to data collection of students. Data of Critical Thinking Skills used 30 students as subjects whose raw data was analyzed using statistical tests. E-Module obtained a validity score of 83.33% on the material validation and 84.6% on the media validation. Moreover, the statistical test showed that there is a significant change in implementing E-Module, which means that the HOT-LAB-based E-Module improved the students' Critical Thinking Skills.

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The purpose of writing this paper article is to review students' perceptions in the use of PhET-based virtual labs and also to provide a description in comparison to perceptions of virtual lab use from some of the results of previous studies that are relevant to this study. There are five aspects in the perception that will be surveyed, including; (1) aspects of innovation, (2) aspects of benefits (3) aspects of motivation, (4) aspects of effectiveness, (5) aspects of presenting procedures for laboratory activities. The method used is quantitative and qualitative with a Likert scale questionnaire which must be filled in by 40 people and then interviewing the subjects, after the data is collected, percentage data analysis is carried out. The results of the data analyzed show that the aspects of innovation, effectiveness, benefits and presentation of the procedure get a positive view compared to the motivational aspects which are stated to be negative, so this study also shows that the use of virtual labs based on PhET is innovative and effective, but lacks motivation in its use because of essential activities. laboratory is not felt, in presenting the module is required to increase 4C Skills to support 21st century skills

Pandemi Covid-19 menjadi kendala dalam melaksanakan kegiatan eksperiman secara langsung. Namun demikian dapat diatasi dengan percobaan interaktif menggunakan Virtual Lab yang sistematis dan memiliki akurasi yang baik. Dalam penelitian ini dilakukan kegiatan praktikum secara virtual menggunakan simulasi PhET yang dipadukan dengan HOT-LAB guna mengetahui perbandingan antara virtual lab dengan real lab yang dipadu dengan HOT-Lab. Metode yang digunakan adalah dengan uji perbandingan dari hasil analisis data percobaan antara Data Analytics dan Graphic Analytics. Berdasarkan hasil penelitian menunjukkan selisih hasil virtual lab dengan real lab relatif pada batas nilai ralat.  Hasil perhitungan berat (W) di udara pada m1 = 1 kg sebesar (9,51 ± 0,951) N, m2 = 2 kg diperoleh (19,32 ± 1,932) N, dan m3 = 5 kg diperoleh (45,6 ± 13,68) N. Sementara itu perhitungan berat (W) di medium air pada m1 = 1 kg yaitu (0,43 ± 0,043) N, m2 = 2 kg sebesar (9,615 ± 0,9615) N, dan untuk m3 =5 kg diperoleh (24,35 ± 4,87) N. Perhitungan selisih volume untuk m1 =1 kg sebesar (5,15x10-4 ± 0,0024) m3, m2 =2 kg diperoleh (1,2 x 10-3 ± 0,0035) m3, dan benda m3 =5 kg (2,66 x 10-3 ± 0,0115) m3. Berdasarkan data tersebut kenaikan grafik pada percobaan relatif sama, rasio perbandingan juga sama, meskipun nilai yang dihasilkan berbeda

Virtual Laboratory (virtual lab) is a series of virtual experiment laboratories that have been designed and programmed to be used by students for practicum, especially during the Covid-19 pandemic. The virtual lab is helpful for student to build content knowledge which usually they do in real practicum activities. The virtual lab is arranged systematically. Therefore, the result should be close to the real value. Here we report our study on pendulum whether the virtual lab experiment yield the same result as the real laboratory (real lab). We compare both results of experimental data using data analytics and also graphic analytics. The results from the study, shows that there is no significant difference between virtual lab and real lab. Thus, the virtual laboratory is a comparable pendulum experimental result for students doing a remote practicum in physics.