Special thanks to COABE member, Jennifer Gagliardi for compiling this exhaustive list.
American English at State
A Starting Point (ASP)
ATLAS ABE
Bow Valley College Literacy Readers (Canada—adapt for the U.S.)
Center for Civic Education
CISA.gov
EL Civics
ESL Discussions
ESL Fast
elli (formerly ESL Library) (Requires subscription).
ESL Podcast: (Excellent resource for Advanced students. Requires subscription.)
ESOL Courses
Facing History
First Literacy
Google Arts and Culture
How to Vote in Every State
iCivics (K12—adapt for AE)
Jennifer ESL
Learning Chocolate
Learn English Feel Good
Learning Chocolate
Learning for Justice (K12—adapt for AE)
Library of Congress
Linguahouse
Listen A Minute
MN Literacy
Newsela (K12—adapt for AE! Subscription Required)
Participate
PBS
Share America
Smithsonian Institute
StoryCorps
Study
Teachers Pay Teachers
TED-ED (K12—adapt for AE. Check video description for links to the lesson plans)
The Change Agent Magazine (Subscription required)
this i believe
USA.gov
US Citizenship Podcast
USCIS
Voice of America
We Speak NYC
We the Voters
Your Election Pal