Digital disruption has brought today's’ learning to a more flexible context. Teachers can innovate various applications on a computer or mobile phone to engage digital-native students. Instagram Stories, a popular feature launched by Instagram in August 2016, has given a big impact to prospective English teachers’ language development as an expression of their identity. Due to the overuse of IG Stories, this research aims at identifying the profile of English education students’ subject and verb agreement as well as its types of mistakes written in their IG Stories. The data of this descriptive study were taken from English education students’ IG Stories in a well-known private university in Yogyakarta. The result shows that most of the students, 80% of the participants, already produced correct S-V agreement in their writing in IG Stories while 20% of them still made mistakes. Few of them wrote an incorrect form of S-V agreement, used inappropriate tense, and made unnecessary omission and addition. This research can be an insight for English practitioners to make use of SNS as the media to teach writing for fostering students’ critical thinking skills in language learning.