National Geographic Online Curriculum

https://mts.cengage.com/course/MFWS1MYJDAX5UN6CHQDB1VWNBEZCVXP1/edition/student/

EL Civics: Government run website for English Language learners

https://elcivics.com/ 

Class Dojo

https://www.classdojo.com/ 

Duolingo: Language learning website

https://www.duolingo.com/