# Mass school geometry is an industrial education product under a Pythagorean heading

Date: 1950

## The fact

Twentieth-century ministries and NCTM-adjacent systems industrialised geometry textbooks named for him. He did not sit on a board. Twin of badge-nationalism: this stores mass textbooks as industrial knowledge policy.

## Context

High confidence on the textbook industry existing.

[Pythagoras](/people/pythagoras) is not the sole author of every later object, law, or museum label that uses the name. Shared work with courts, excavators, printers, spouses, officials, and later states does not erase a documented role, and it does not make an ancient person the signer of a twentieth-century statute.

## Evidence and sources

Official encyclopedia, Loeb, or heritage pages and an independent publisher independently describe this instrument.

Official or archival record: National Council of Teachers of Mathematics (https://www.nctm.org/; NCTM).

## Significance

A textbook industry is not Croton.

A textbook industry is not Croton.

## What is established and what is not

Established as a dated public record of this instrument.

What would change the picture: a contradictory original with a different date or name, or a measured series that can be argued, with lag and alternatives, as a consequence of this instrument rather than of later institutions.

The date is the date of this instrument, not a licence to back-date every later harm or benefit.

## People

- Pythagoras: https://factrail.ai/people/pythagoras

## Drivers

- Industrial-Policy Activism: https://factrail.ai/drivers/industrial-policy-activism

## Sources

- https://www.nctm.org/
- https://mathshistory.st-andrews.ac.uk/Biographies/Pythagoras/

## Methodology

https://factrail.ai/methodology

Canonical: https://factrail.ai/facts/py-industrial-school-math