- Online survey for learning from Dec. 21, 2022 ~ Jan. 04, 2023.
- Online survey for learning from Dec. 27, 2021 ~ Jan. 09, 2022.
- Online survey for learning from June 3, 2021 ~ June 16, 2021.
- Online survey for learning from June 7 to June 20, 2018.
- Online survey for learning from June 8, 2020 ~ June 21, 2020.
- Online survey for learning from Mar. 17, 2023 ~ Mar. 31, 2023.
- Online survey for learning from Mar. 18, 2022 ~ Apr. 01, 2022.
- Online survey for learning from Mar. 20, 2024 ~ Apr. 03, 2024.
- Online survey for learning from Mar. 26, 2021 ~Apr. 9, 2021.
- Online survey for learning from Mar. 30, 2020 ~Apr. 12, 2020.
- Online survey for learning from May 26, 2022 ~ June 8, 2022.
- Online survey for learning from May 30, 2019 ~ June 12, 2019.
- Online survey for learning from May. 25, 2023 ~ June 7, 2023.
- Online survey for learning from Oct. 08, 2019 ~Oct. 21, 2019.
- Online survey for learning from Oct. 09, 2018 ~Oct. 22, 2018.
- Online survey for learning from Oct. 11, 2022 ~ Oct. 24, 2022.
- Online survey for learning from Oct. 11, 2023 ~ Oct. 25, 2023.
- Online survey for learning from Oct. 13, 2020 ~Oct. 26, 2020.
- Online survey for learning from Oct. 19, 2021 ~ Nov. 01, 2021.
- Stage I computer random-selection schedule and notification