My second conversation was in an ESL communication class with a mixed bunch of introverted and extroverted students. This was a pretty unique class and it got me thinking about a lot of things. How can an extroverted or introverted personality in ELL and ESL students affect behaviour, learning process and classroom environment? Extroversion versus Introversion the terms originated from psychologist Carl Jung’s theory of personality. Jung saw the extrovert as directed toward the outside world and the introvert as directed toward the self or inside world. That is why, theoretically, introvert students are less involved in the classroom and extrovert students are more active. As I observed the classroom, I noticed how students’ personality and behaviour could make a significant impact in a classroom. In a classroom where students are struggling to acquire or dominate a second language, it was highly interesting to observe how their personality can make a difference in the way they can perform in the classroom. During my observation I identified the students by the speech (pronunciation or deficiency of English vocabulary usage), and I noticed the teacher had also made several cluster depending on their English fluency. I observed that among the 14 ELL and ESL students 5 of the students I classified as introverted students: like to be alone, like to be silence, and never participate, while the other 9 students were obviously extroverted students: most of them like to work in-group, are more social, participate, and like attention.