This is the 14298th most frequent Turkish word.
okumasını
"The act of reading."
Here, 'okumasını' is derived from 'okumak' (to read) and represents the action of reading in a possessive construction.
Kitap okumasını çok seviyorum.
I love reading books.
In this sentence, 'okumasını' refers to the act of reading something, governed by the directive verb 'söyledim' (told).
Ona hikaye okumasını söyledim.
I told him to read the story.
Here, 'okumasını' describes the act of reading as part of the teaching process, linked to 'öğretiyor' (is teaching).