1. A. P. Astuti, A. Aziz, S. S. Sumarti, and D. A. L. Bharati, “Preparing 21st century teachers: implementation of 4c character’s pre-service teacher through teaching practice,” J. Phys. Conf. Ser., vol. 1233, no. 1, 2019, doi: 10.1088/1742-6596/1233/1/012109.
2. A. Rahardjo and S. Pertiwi, “Learning motivation and students’ achievement in learning english: a case study at secondary school students in the covid-19 pandemic situation agus rahardjo,” JELITA J. English Lang. Teach. Lit., vol. 1, no. 2, pp. 2721–1916, 2020.
3. J. Vogelzang, W. F. Admiraal, and J. H. van Driel, “Scrum methodology as an effective scaffold to promote students’ learning and motivation in context-based secondary chemistry education,” Eurasia J. Math. Sci. Technol. Educ., vol. 15, no. 12, 2019, doi: 10.29333/ejmste/109941.
4. Sari Famularsih, “Students’ experiences in using online learning applications due to covid-19 in english classroom,” Stud. Learn. Teach., vol. 1, no. 2, pp. 112–121, 2020, doi: 10.46627/silet.v1i2.40.
5. A. R. Siburian, M. G. M. B. G. Manik, and E. Saragih, “Writing teaching strategies in online learning by junior high school english teacher 1,” J. Darussalam J. Pendidikan, Komun. dan Pemikir. Huk. Islam, vol. XIII, no. 2, pp. 468–486, 2022.