During the latter portion of simulation lab today, I was instructing approximately 18 students on IV therapy calculations.  While performing calculations with students in an interactive manner, Makinde exhibited disinterest and disrespect.  While I was interacting with students and answering math related questions, he verbally expressed his disinterest and what appeared to be \"annoyance\" by sighing loudly and using expressions such as \"come on\", \"no more\", etc.  This occurred multiple times as I asked students if they had any further questions or required more math examples.  A student raised her hand and requested that I demonstrate a specific calculation, at which time, Makinde again used verbal cues to display his lack of interest.  At that time, I made it known that he was welcome to leave the simulation setting if he didn\'t find it \"interesting\" or \"educational\".  I also expressed to him and the entire group that this was important information related to upcoming exam, however, if he found it unnecessary, he should leave the room immediately.  Makinde chose to stay for remainder of simulation lab and made an apology for his disruption at the conclusion of simulation lab.  