A new Medium blog post. After drowning in preparation for yet another literature review, I decided to share some overviews, because I believe this fascinating area of research deserves a bit more attention :) I plan to soon publish more posts on other aspects of computer-assisted language learning, such as second language acquisition modelling and automatic question generation. As a part of my project, I am developing methods to assess how readable texts are. So, this is the first post in the series, enjoy!