Well, if anyone believes that Islam is the best religion and we should follow and respect Islam by our soul, mind, body and deeds, then in Islam the concept of co-ed is not presented, or given or even allowed. All the concepts and teachings of Islam have logics, and none of them are without logics or the facts and understandings behind them. So, if concept of Co-ed is not given in Islam, it means that it is not beneficial in any sense for any society, nation, people, country and whatsoever. Examples of co-ed are here, see USA, in their high schools, more than 90 percent of the girls and guys are involved in sexual activities, they have no connection with family values and the whole nation becoming mother-father free, they have lost all their values, most of them have no families, kids are unaware of their parents, parents living in old houses after retirement or being alone after a certain age, no family system, depression and isolation, the nation is declining day by day. All those are the fruits of coed and not only coed. but mixing of men and women on every level.....in schools...colleges...universities...work...offices...malls...streets...everywhere.... W name it as Modernization, Liberalism, Equality, No Discrimination......but in real its the declination of all. These US people say they are very liberal and no discrimination ....Tell Me one thing until now why not the woman become the president of US. Hillary Clinton lose the campaign in-front of a black guy, even white still do not like blacks by their hearts, still Hillary lose the campaign just because of she is a female and US people do not want by their heart that a woman leads US as a President of the country. Thats what Islam also says any country, nation, region, tribe, MUST lead by a Male. Follow Islam and you will be on the right path ....Do Not follow West..... They show you the illusions and they do practice something else for themselves in real...so please stop to follow ILLUSIONS....FOLLOW ISLAM....THE REALITY AND THE TRUTH