This add in called 'Learning Tools' allows effortless dictation, as well as the amazing ability to chaneg text into other forms that are easier to read. It can also highlight and separate the parts of speech; verbs, nouns and adjectives. It can even break words into syllables, and make text easier to comprehend.
This Forbes article explains this and more.
This article explains how to download and install it. It also has a great video tutorial that provides an overview of the features.
Take the time to read these articles. It will positively impact many, many students.
The video below also highlights how this tool can be used to assist dyslexics.