One possible explanation for the lack of activities focused on vocabulary learning in
the graded readers analyzed can be the students' level. At the elementary level, graded
readers' tasks might have to be more focused on reading comprehension activities' to make
sure students understand the text's main ideas. When the student's level increases, graded
readers can dedicate more activities to work on grammatical knowledge and vocabulary
learning. For this reason, in future studies it would be relevant to include a broader range
of graded readers, which include books aimed at students with different levels of proficiency.
On the same page, a revision of the TFA framework is suggested by this study. Five
of the 18 criteria are not present in any of the activities analyzed in the graded readers and
are not relevant enough to measure vocabulary activities in the graded readers.
Furthermore, the TFA framework gives the same value to the 18 components. A future
study should analyze if a number of the criteria are more important than the others.
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