In slang, "old school" or "old skool" can refer to anything that is from an earlier era or anything that may be considered "old-fashioned". The term is commonly used to suggest a high regard for something that has been shown to have lasting value or quality.

It may refer to:

https://en.wikipedia.org/wiki/Old_school

"There are all kinds of interesting questions that come from a knowledge of science, which only adds to the excitement and mystery and awe of a flower."
Richard Feynman
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