Saddleback Educational Publishing - http://www.sdlback.com/ High interest, low level reading books for teens. They also offer classic books in easy to read format.
National Geographic Learning Cengage - https://ngl.cengage.com/search/showresults.doN=201+4294918395&Ntk=NGL&Ntt=leveled+Book+FInder&Ntx a leading educational publisher of
A leading Educational publisher of PreK-12 digital and classroom curriculum. Topics include fiction, nonfiction, Geography, History / Culture, Science, Technology, and Mathematics.
WIDA https://wida.wisc.edu/ - WIDA believes that the best way to support language learners’ success is to support the entire system. They design standards and assessments, create teaching tools, offer instructional support, and provide opportunities for professional learning to empower educators.
Voice of America - https://learningenglish.voanews.com/p/5373.html
New Readers Press - https://www.newreaderspress.com/ New Readers Press offers a number of core reading products for adults to help even the lowest-level learners succeed.
EL Civics - https://www.elcivics.com/ ESL Resources. Short articles about daily life, worksheets, one page reading articles with questions.
Pro Lingua - http://www.prolinguaassociates.com/ Pro Lingua was founded in 1980 by three teachers who felt the need for teacher and student friendly materials. They have almost 100 titles of ESL resources, many of which are photocopiable.