I think that Cornell notes are very useful because they can be organized and it will show you the exact key ideas and its meaning separate, so if you know the meaning and you don’t know the key idea then you can fold it and only study the words. I found out about the key idea of Cornell notes from my teacher but how i found the reason for the Cornell notes by clicking the first link in google classroom. the reason Cornell notes are useful is that if you read the Cornell notes key ideas in the left column and then you read the summary at the bottom column then briefly read over the main information in the right column of the page and you are sure to get an A+ on any test or assignment.
This the before sheet with not any information other than the key ideas.
this is the after sheet with much more information about the questions and subjects.