Susan Wise Bauer: a fantastic go-to resource for Classical Education for Christians and Non-Christians
Circe Institute: an ecumenical Christian institute providing resources and advocacy for classical Christian education.
Image Journal - Arts, Faith, and Mystery: Based at Seattle Pacific University, Image Journal is the premier journal on religiously inspired contemporary fine arts. Its a go-to resource for movie reviews, essays, poetry, photography, painting, sculpture, and Christian engagement in the Fine Arts.
Hagia Sophia Academy downloads and resources. An Eastern Orthodox Classical Academy with a helpful list of resources.