This might be the best list I have come across in my searches.
“We’ve arranged our favorite online educational websites into 11 different categories that cover everything from lesson planning to teacher-focused YouTube channels. Each section contains a handful of links to online resources equipped with our reasons for why we think they’re great, who would benefit from them, and each resources’ targeted grade level. “
Bookmark this resource: https://www.albert.io/blog/educational-teacher-websites/