Leony Sanga Lamsari Purba

Leony Sanga Lamsari Purba
Universitas Kristen Indonesia · Pendidikan Kimia

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27
Publications
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95
Citations

Publications

Publications (27)
Article
This study aims to determine the increase in learning outcomes using thequizizz-assisted zoom application in chemistry learning during the Covid-19pandemic. This research is quantitative research with a population of allstudents of SMA Pelita Kasih and the sample using the True Experimentalmethod takes the Pretest - Posttest Control Group Design. T...
Article
Full-text available
Practical learning which is generally carried out in the laboratory is one of the important lessons in the science learning process, especially chemistry. The Covid-19 pandemic has caused practical learning activities to not be accommodated in real laboratories. This situation encourages the creation of practical learning innovations, namely the us...
Article
Penelitian kuasi exsperiemen  ini bertujuan untuk mengetahui peningkatan hasil belajar kimia siswa melalui metode eksperimen. Rancangan penelitian yang digunakan adalah prettest posttest control group design. Populasi penelitian ini adalah seluruh siswa SMA Widya Manggala. Sampel dkelas X MIA1 sebagai kelas eksperimen dan X MIA2 sebagai kelas...
Article
This study aims to determine the effectiveness of online learning using Microsoft Teams 365. The entire population in this study was used as a research sample, namely all students of the Chemistry Education study program, Indonesian Christian University, Jakarta. Perception data was collected using a questionnaire with dimensions of understanding t...
Article
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This study aims to determine the effect of explicit instruction learning models and the percentage of student learning outcomes improvement in chemistry. Explicit instruction learning model is the free variable while the dependent variable is learning outcomes. This research method is a quasi experiment with the research design nonequivalent contro...
Article
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The purpose of this study was to determine whether benzoic acid can be isolated from Frankincense by using safonification method followed by hydrolysis. The Frankincense sample used is Tapanuli Frankincense, also known as Frankincense Toba or more commonly called Haminjon. Furthermore, the results obtained are identified through chemical tests and...
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Abstrak Perencanaan merupakan salah satu unsur penting pada proses pembelajaran. Perencanaan yang baik umumnya berkontribusi positif pada keberlangsungan proses pembelajaran terutama dari sisi keteraturan. RPP merupakan perangkat perencanaan pembelajaran semester yang disusun oleh guru mata pelajaran. Dengan adanya RPP diharapkan pembelajaran dapat...
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This research is a quantitative study which aims to determine the results differences of the 2nd National Chemistry Olympiad at the public and private senior high school using quizizz media. All participants of the population were sampled in the determination, the sampling technique used was saturated samples. The results of the prerequisite test o...
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Concentration of student's learning is an important variable that can affect cognitive, affective, psychomotor, and students' scientific process skills. In efforts to improve the concentration of student's learning can be done by applying models, media, and learning strategies. In the study, interpretation and analysis of data increases the concent...
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Pandemi Covid-19 yang terjadi di seluruh dunia telah membuat perubahan dalam banyak hal di kehidupan masayarakat. Secara khusus di Indonesia, berita tentang maraknya penyebaran virus covid-19 mulai pada bulan Januari 2020 hingga akhirnya awal Maret pemerintah mengambil keputusan yang sangat sulit dengan mengeluarkan kebijakan Pembatasan Sosial Bers...
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This study uses a quantitative approach with experiment. The population in this study were all students of the Faculty of Chemistry Education Teacher Training and Education (Guidance and Counseling) Indonesian Christian University (UKI), which follows the course of Chemical Physics 1. The purpose of this study was to determine the effectiveness of...
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Problem solving skills have important role on process science skills. These skills are part of 21 st century priority skills in Indonesia. This study aims to analyze the impact of learning based e-project on problem solving skills. This study employed methods a nonequivalent control group design. The subject of this research are students’ of class...
Article
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RPP merupakan instrumen perencanaan pelaksanaan pembelajaran yang disusun guru setiap semester. Instrumen ini dapat dimanfaatkan sebagai salah satu alat kontrol pelaksanaan pembelajaran. Pada kegiatan ini dilakukan sosialisasi pengembangan kompetensi guru kimia terintegrasi ranah afektif, dimana RPP menjadi salah satu indikator dan output kegiatan....
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Full-text available
Oxygen content in the surrounding air affects the oxygen intake of the human brain. In learning, the adequacy of brain oxygen affects students' readiness to begin learning, which can be observed through the concentration of student learning. Through this research, information on the effect of school air oxygen content on student concentration will...
Conference Paper
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ABSTRAK Era modern saat ini menuntut pembelajaran berpusat pada siswa. Dengan demikian, praktikum menjadi salah satu komponen penting dalam proses pembelajaran kimia. Dengan praktikum, siswa diberi kesempatan untuk berkreasi dan mengaplikasikan teori sekaligus menumbuhkan softskill. Namun, kegiatan praktikum membutuhkan perangkat pembelajaran agar...
Article
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Practicum is an important element in chemistry. In chemistry learning with practical methods students are given the opportunity to be creative, find, or prove a phenomenon that he experienced and the concepts his learned. Therefore, it is important to develop the learning method using practicum to accommodate the progress and needs of the times so...
Conference Paper
Full-text available
Kandungan oksigen di udara sekitar mempengaruhi asupan oksigen otak manusia. Dalam pembelajaran, kecukupan oksigen otak mempengaruhi kesiapan siswa untuk memulai pembelajaran. Kesiapan siswa dalam pembelajaran dapat diamati melalui konsentrasi belajar siswa. Melalui penelitian ini, akan diperoleh informasi pengaruh kandungan oksigen udara sekolah t...
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Full-text available
Chemical security is one of the important indicators in the chemistry learning process. It is important for students to explore their knowledge of the conscious attitude of chemical security. Insecure attitudes will cause problems for these students, others, and the environment. Many sources can be used to foster a conscious attitude to chemical se...
Article
This research is a pure experimental study with a pre-test and post-test onlycontrol design. The population includes all students of class XI MIPA SMAN 92Jakarta Semester I Academic Year 2018/2019. The study sample consisted oftwo classes with a sample size of 58 students determined by purposive sampling.The research instrument is a test question....
Article
This research is a descriptive qualitative study to determine the increase instudent learning concentration through the use of quizizz learning evaluations inPhysics Chemistry I. The population in this study were all Chemistry EducationStudents FKIP-UKI, with student sampling in the 3rd semester of the 2018/2019academic year. Questionnaires that ar...
Article
The development of social media into today's style of life. The decline in the child's desire to follow communities a result of the use of social media affect the formation of character in children. Character education is a very good effort from all of people who develop education. Science briefing will children with good character is the responsib...

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