Free eBooks
For all grade levels - EBSCO eBooks through texquest.net
For some additional options, primarily for Pre-K-2, and some grade 3 click on the following links.
Brain Hive
Choose student. Select the campus from the dropdown. Enter the username: brainhive and password: brainhive
Unite for Literacy
https://www.uniteforliteracy.com/
Storytime From Space
https://storytimefromspace.com/