Answer:
We shouldn't have to. It should be optional
Explanation:
The first reason is the students need a break if we do too much school work it will cause a lot of stress. Another reason is the teachers need a break from teaching to spend time with their families and grade papers.
Why tell the book in short stories instead of chapters?
Why call the enemy the "Other"?
Why did O'Brien not tell the book chronologically?
Hope this helps!
You can look for more information about the Battle of Little Big Horn here:
http://www.eyewitnesstohistory.com/custer.htm
Here about General Armstrong Custer:
https://www.civilwar.org/learn/biographies/george-armstrong-custer