Free Gods and Goddesses Vectors via Vecteezy.
Factual information from Wikipedia and other educational sites.
Free resources from Twinkl.
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“Publishers and the academic community have established a set of educational fair use guidelines to provide “greater certainty and protection” for teachers. While the guidelines are not part of the federal Copyright Act, they are recognized by courts and the Copyright Office as minimum standards for fair use in education. A teacher or pupil following the guidelines can feel comfortable that a use falling within these guidelines is a permissible fair use and not an infringement.
The educational use guidelines can be found in Circular 21, provided by the Copyright Office.”