The document can be viewed here.
I would say your rumour is incorrect. The closest is page 14, which is pretty benign, under Best Practices:
Quote:
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School forms, websites, letters, and other communications use non-gendered and inclusive language (e.g., parents/guardians, caregivers, families, partners, “student” or “their” instead of Mr., Ms., Mrs., mother, father, him, her, etc.).
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There are other parts of that document that are harder to defend, but I can't say that using the words Parents or Guardians rather than Fathers and Mothers isn't a best practice in communications with students.