Flyleaf Publishing: Free eBooks for Grades K-3

NC Kids Digital Library: eBooks for Grades K-5 (free with library card)

PBS Kids Math: Math Games for Grades K-1

Canvas: Classwork for Grades 3-5

Dreambox: Math Practice for Grades K-5

Letterland: Reading Practice for Grades K-2

myON on Renaissance Learning: eBooks for Grades K-5