https://www.scholastic.com/teachers/teaching-tools/book-lists/16-best-books-to-get-kindergartners-reading.html

https://shop.scholastic.com/teachers-ecommerce/teacher/shops/grab-and-go-student-packs.html

https://launchpad.classlink.com/rcboe

-Epic in Launchpad has tons of Kindergarten leveled readers as well as Storyline and Hearatale.