1. Lim D. H. and Morris M. L., Educational Technology & Society, 12(4), 282–293 (2009).
2. Ministry of Education, “Regulation of the Minister of Education and Culture of the Republic of Indonesia Number 22 of 2016 concerning Basic and Secondary Education Process Standards” (BNSP, Jakarta, 2013)
3. Suyanto S., Educational Scientific Journal, 1, 22–29 (2018).
4. Ministry of Education, “Regulation of the Minister of Education and Culture of the Republic of Indonesia Number 81 A of 2013 concerning currikulum implementation” (BNSP, Jakarta, 2013)
5. Hendriana H., Putra H. D. dan Ristiana M. G. Int. Conf on Mathematics and Science Education of Universitas Pendidikan Indonesia (Universitas Pendidikan Indonesia, Bandung, 2018) pp. 597–601