Online lessons and curriculum

The following sites contain full lessons and curriculum plans designed for remote learning:

Teaching Matters, DOE-aligned curriculum for grades K-8
Scholastic is offering free online courses, grades Pre-K to 9
CK-12 - free curriculum, K-12, some with Google Classroom lessons to download
PBS Learning Media has packaged lessons, most with multimedia, for all grade levels
eMath Instruction has complete, online math courses for grades 6-12