Educators, administrators and parents are often concerned with issues related to efficiency of a specific medium. Most of the time this relates to reading speed or fluency. Be careful not to fall into the trap of believing that how fast a pupil reads is the most important factor in determining a learning medium. While fluency is an important consideration, especially when considering the pupil's ability to complete required work in an inclusive classroom, it must be considered in the context of factors like comprehension and physical fatigue. It is also important to realize that there are effective teaching strategies to increase fluency.
You may find it useful to read information about reading rates.