Thus, without graded readers, elementary and intermediate learners would not be able to do extensive reading at the proper vocabulary levels (Nation & Deweerdt, 2001) and a very important means of reading skill development, language consolidation and vocabulary learning would not be available to them. Corpus research on the conditions for vocabulary learning provided by graded readers (Nation & Wang, 1999) provides useful guidelines on how to use such readers and suggests that the levels of some of the many graded reading schemes could be usefully redesigned. In spite of these minor shortcomings, graded readers provide an enormously helpful resource for the development of reading skills, vocabulary growth and other associated benefits for language learners