Educators have become increasingly interested in the learning benefits that mobile technology can provide to students in and out of classrooms. While there is considerable enthusiasm for using mobile devices to support learning with their multimedia capabilities, portability, connectivity, and flexibility, there is a paucity of research evidence about whether such mobile technology can facilitate learning for K-12 students, specifically the English Language Learners (ELL) population. This study examined how ELL teachers and their students at two middle schools used the iPod touch to support the teaching and learning and explored the potential benefits of such mobile devices as a teaching and learning tool. With multiple quantitative and qualitative data sources, from both teachers' and students' perspectives, the findings of this case study suggest that incorporating the iPod touch in ELL instruction provided significant support for improved learning capacity along with distinct challenges. The results suggest in spite of the challenges teachers face when integrating the iPod touch in their instruction, mobile learning brings unique technological and pedagogical affordances for ELL students.