Whether you teach in an official IB (International Baccalaureate) school, the curriculum contains many resources that are helpful to Latin teachers and students, especially for the upper levels (years 3-4).
Resource page for students
This is where my students go for resources. (work in progress)
Books
Robert Amstutz has published tiered versions of the passages on three of the reading lists now: Love Poetry, Villains, and Social Criticism. Even non-IB teachers and students will be happy to have these resources, as they contain 3 levels of difficulty, comprehension questions, and a complete glossary. These books are available on Amazon