Well, the first paper on AI was published in 1943[1], but unfortunately requires some knowledge of brain science that was ultimately incorrect to understand, and includes some mathematical notation that is relatively obscure for high school.

And this, Turing, and Shannon predate the Macy conferences / Ratio Club by a few years, so I'm not sure I'd call cybernetics a predecessor so much as a defunct offshoot. Though where math stops and CS starts varies depending on the scholar you talk to.

[1]: https://jontalle.web.engr.illinois.edu/uploads/410-NS.F22/Mc...