There are many resources out their to help EAL (English as Another Language) students and students that have language difficulties but these can be very time-consuming and often require one on one supervision and direction from a teacher.
By creating some simple interactive resources you can take some pressure away from the teacher, cater to the individual students needs and be able to provide them with an engaging resource to use outside of the classroom and practice at home, making the time spent with the teacher or aid more valuable and rewarding.
I quickly put together some interactive iBooks as an example. These are using images taken from around the school so the student will feel more connected and familiar with the resource. You can also take advantage of the built-in features of the iPad such as speak selection, note taking, and more to further the learning.
This video offers a very simple example of what can be done (view full screen for more detail)