https://support.google.com/edu/classroom/thread/323733391?hl=en&sjid=12791978037797142041-NC

https://support.google.com/edu/classroom/thread/323705249?hl=en&sjid=2817286173204257217-NC

https://mysupport.partech.com/forums/general-discussion/6503a5f7-46e6-ef11-b542-6045bdba802e

https://alzconnected.org/discussion/72039/faqsguide-what-day-is-the-cheapest-to-book-southwest-flights/p1?new=1

https://support.google.com/edu/classroom/thread/323732690?hl=en&sjid=12791978037797142041-NC

https://support.google.com/edu/classroom/thread/323702944?hl=en&sjid=2817286173204257217-NC

https://mysupport.partech.com/forums/support-forum/55ba6de9-19e6-ef11-b542-7c1e52451124

https://support.google.com/edu/classroom/thread/323699516?hl=en&sjid=2817286173204257217-NC

https://alzconnected.org/discussion/72038/what-is-the-cheapest-day-to-book-flights-on-frontier-cheapest-days/p1?new=1

https://support.google.com/edu/classroom/thread/323726972?hl=en&sjid=409581095869342637-NC