Secular textbooks in Colleges and High Schools

Just wondering if anyone is aware of any Catholic organizations that monitor errors in secular Textbooks, esp. History textbooks. Some of the systemic anti-Catholicisms I see are getting me livid. i.e. Catholic missionaries killed thousands of native americans, the Church suppressed Bible reading, Catholics made slaves of the native populations, etc. To whose attention should I bring these blatant errors to ?

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