If our mind is having a plethora of thoughts we may be able to engage reading but eventually, we lose our focus and discontinue reading. We have to gather our thoughts and senses such as taste, smell, touch, sight, & sound together to develop focus. It takes approx 10 minutes to enter into a flow state and build concentration, which can last for another 30 to 40 minutes.
Teach ability Index: Every writers, authors or teachers, expects someone to read their material, understand them well and apply in relevant field. The encourage us to use the valuable information shared by them for general purpose or profession specific areas.
However, if we are not teachable that we will be unable to absorb their valuable information and evantually fail their purpose. So its highly recommended to be teachable when you are forming new reading habits.
This is your own willingness to learn content of any material. If you are not willing to learn the material then regardless of effort made by teachers you will not grasp any ideas.