This study analyzed the effects of the implementation of the readers' workshop on students' reading levels and comprehension skills in a first-grade, mixed-ability classroom in Lebanon. The instruments used at the beginning were running records and reading continuums, and at the end of the academic year, teachers' professional notebooks and notes from the guided reading sessions and teacher-student conferences. The results showed that the readers' workshop, when used as a differentiated reading approach, improved students' reading levels and comprehension skills.