- Black Cat - CIDEB
- Cambridge University Press
"...an exciting new series of original fiction, specially written for learners of English."
- E-books World
World Wide Readers (E-books) edited by Brian Tomlinson & Alan Maley
- Easy Readers
- Macmillan (Heinemann)
The site includes free downloadable worksheets for their titles
- Oxford
Contains useful info: "What are graded readers", "How are readers graded?", "Some ideas for using graded readers"
and "Setting up a class library".
- Penguin
Contains downloadable teacher's notes and worksheets in PDF format
- Renaissance Learning
Features the "Accelerated Reader" system with computerized quizzes and record tracking for over 22,000 titles.
- Richmond Publishing
Offers free graded readers downloadable as PDF files
- SRA Reading Labs
Not "extensive reading material" per se but often used in conjunction with extensive reading programs
- See Rob Waring's page for some other possibilities