Special thanks to COABE member, Jennifer Gagliardi for compiling this exhaustive list.
American English at State
A Starting Point (ASP)
ActiVote
ATLAS ABE
Bow Valley College Literacy Readers (Canada—adapt for the U.S.)
Center for Civic Education
Center for Media Literacy
CISA.gov
Civics Renewal Network
Common Sense Education
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)
I Side With
Jennifer ESL
Learn English Feel Good
Learning Chocolate
Learning for Justice (K12—adapt for AE)
Library of Congress
Linguahouse
Listen A Minute
MN Literacy
National Constitution Center
Nearpod
NELRC: Change Agent Magazine (Subscription required)
Newsela (K12—adapt for AE! Subscription Required)
News Literacy Project
Participate
PBS
ProLiteracy
Share America
si.edu
StoryCorps
Study
Teachers Pay Teachers
Teaching for Democracy Alliance
TED-ED (K12—adapt for AE. Check video description for links to the lesson plans)
this i believe
USA.gov
US Citizenship Podcast
USCIS
Voice of America
We Speak NYC
Your Election Pal