| Persepsi Siswa terhadap Google Classroom sebagai LMS pada masa Pandemi Covid-19 N Harefa, S Sumiyati Science Education and Application Journal 2 (2), 88-100, 2020 | 82 | 2020 |
| Analisis Minat Belajar Kimia Siswa Melalui Pembelajaran Berbasis Multimedia N Harefa, GS Tafonao, S Hidar Paedagoria: Jurnal Kajian, Penelitian dan Pengembangan Kependidikan 11 (2 …, 2020 | 52 | 2020 |
| The difference of students’ learning outcomes with project based learning using handout and sway Microsoft 365 N Harefa, NFD Silalahi, E Sormin, LSL Purba, S Sumiyati Jurnal Pendidikan Kimia 11 (2), 24-30, 2019 | 44 | 2019 |
| Effectiveness of use of online games kahoot! chemical to improve student learning motivation LSL Purba, E Sormin, N Harefa, S Sumiyati Jurnal Pendidikan Kimia 11 (2), 57-66, 2019 | 42 | 2019 |
| Improvement of student’s learning outcomes and motivation with chemical practicum e-module N Harefa, NFD Silalahi Jurnal Pendidikan Kimia 12 (1), 10-19, 2020 | 27 | 2020 |
| Students perception and interest on chemistry: Learning evaluation integrated quizziz media N Harefa, M Sinaga, S Silaban Jurnal Pendidikan Kimia 12 (3), 143-150, 2020 | 22 | 2020 |
| Learning management system aplikasi E-Learning untuk pembelajaran online dan blended N Harefa UKI Press, 2020 | 20 | 2020 |
| Pengaruh Kandungan Oksigen Udara Sekolah Terhadap Konsentrasi Belajar Siswa LSL Purba, N Harefa Jurnal EduMatSains 4 (2), 169-182, 2020 | 19 | 2020 |
| Science generic skills of ‘chemistry’? prospective teachers: A study on collaborative learning using Exe-media N Harefa, RD Suyanti Journal of Physics: Conference Series 1397 (1), 012032, 2019 | 14 | 2019 |
| The development of chemistry practicum e-module based on simple-practice N Harefa, LSL Purba Jurnal Pendidikan Kimia 11 (3), 107-115, 2019 | 13 | 2019 |
| Hubungan motivasi belajar terhadap keterampilan pemecahan masalah siswa pada metode praktikum N Harefa Jurnal Selaras: Kajian Bimbingan dan Konseling serta Psikologi Pendidikan 1 …, 2018 | 13 | 2018 |
| Problem solving skills improvement and the impact on students’ learning outcomes: learning based e-project N Harefa, LSL Purba Journal of Physics: Conference Series 1567 (2), 022038, 2020 | 10 | 2020 |
| Analisis kandungan vitamin C bahan makanan dan minuman dengan metode iodimetri N Harefa, N Feronika, AD Kana, R Hutagalung, D Chaterine, Y Bela Science Education and Application Journal 2 (1), 35-42, 2020 | 10 | 2020 |
| Tren Minat Belajar Kimia Mahasiswa Terhadap Pembelajaran Online Selama Pandemi Covid-19 N Harefa Penerbit LPPM UNNES 11, 86-94, 2021 | 8 | 2021 |
| Implementasi webinar terhadap sikap sadar keamanan kimia mahasiswa N Harefa, S Gultom, LSL Purba Jurnal Dinamika Pendidikan 12 (1), 17-28, 2019 | 8 | 2019 |
| The differences of achievement of the national olympiad in chemistry at the public and private senior high school by utilizing quizizz media LSL Purba, N Harefa, S Afridika, D Savera Jurnal Pendidikan Kimia 13 (1), 69-77, 2021 | 7 | 2021 |
| AKSI UKI PERDULI DALAM RANGKA PENCEGAHAN PENYEBARAN VIRUS COVID-19 E Sormin, N Harefa, F Sitompul, ES Arodes, JM Cing, A Tehupeiory, ... Jurnal Comunità Servizio 2 (2), 471-478, 2020 | 7 | 2020 |
| Sensitivitas ligan ditizon terhadap absorbsi logam zink dengan teknik emulsi membran cair N Harefa Jurnal EduMatSains 3 (1), 57-68, 2018 | 7 | 2018 |
| Analysis of BOD and COD levels for home industry wastewater: A case study in a sewage streams N Harefa, A Gulo, S Silaban Jurnal Pendidikan Kimia 13 (1), 2021 | 6 | 2021 |
| The effect of colloids practicum e-module to improve students’ interest on virtual lab during the covid-19 pandemic N Harefa, NFD Silalahi, LSL Purba, HF Sianipar Jurnal Pendidikan Kimia 13 (3), 172-179, 2021 | 5 | 2021 |
