Legally there is nothing wrong with having casinos around institution of learning but I think it should depend on the level of education we are talking about. If it is university, the effect will be lower because the students would have come of age and can manage their time and resources better so that they don't face major distraction as a result of gambling. But for lower level of education, having gambling around them might pose serious dangers. So if I have to give my opinion, I will suggest that casinos should not be located around younger children environment.
Are you talking about schools? Every offline casinos has a security guard and that person will never let schools kids gamble or even in. In addition an object of interest of school kids are far away from gambling. University students might be more interested in gambling, as they get their first access of freedom of adults life, however I doubt that students would have free money for gambling. Instead, students would rather grab a beer during breaks if there is a store nearby (that what students used to do during lunch breaks when I was in university).