Stanford's Chris Piech: volunteer teacher-to-student ratio stable at 1:10 for six years, even online
chrispiech · x · 2026-10-02
Stanford professor Chris Piech shares that across six years of his public Stanford classes — which take both students and volunteer teachers — the volunteer-to-student ratio has always hovered around 1:10. He expected an online probability class to look wildly different, but the ratio held. The consistency of volunteer teaching supply in large-scale online education is a notable empirical observation.
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