Based on the article "Clichés still offer good wisdom for teachers"
https://goodteaching.net/2020/03/cliched-phrases-still-offer-good-wisdom-for-teachers/
Based on the article "Setting the right tone on the first day of class"
https://goodteaching.net/2020/02/setting-the-right-tone-on-the-first-day-of-class/