The University of Waterloo has the Centre for Education in Mathematics and computing. They have some good material for grades 7 & 8 as well as high school.
I enjoyed this book although I did find it quite slow and a bit boring at the end. I vaguely knew about some of the Greek myths but learned quite a bit from reading this book.
Stephen Frye tries to tell the stories in a structured timeline that is easy to follow and understand. At times, he tells the stories as if the characters were modern, ordinary personalities. I found these parts to be the best, and at times quite funny.
There is a reference provided at the end of the book that I found useful:
https://www.theoi.com
Nice idea, but as other commenters has pointed out, maybe not the best name. Back in the 90’s when I first connected to the internet, my ISP provided a package called Internet in a Box made by a company called Spry.
https://en.wikipedia.org/wiki/IBox
https://cemc.uwaterloo.ca/resources/courseware/courseware.ht...