system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What about Shakespeare has made it almost universally taught in high schools?
gpt
It's basically the first good example of "modern" English literature.  While some translation is usually done to replace obsolete or obscure wording, they're largely legible in their original form.

There are older texts of course, but much of it is drab religious or political material.  Once you're out before the 1500s and widespread priting press usage, texts like the Canterbury Tales are written in illegible Middle English.