- Delaware County co.delaware.pa.us/
- Digital Scholastic
- American Library Association (ALA) ala.org/
- Black Caucus American Library Association(BCALA) bcala.org/
- Library of Congress https://loc.gov/
- Pennsylvania Library Association palibraries.org/
- Young Adult Library Services Association ala.org/yalsa/
- Lexile Framework for reading- “Just Right Book”
- Lexile.com
- Lexile YouTube Channel