The question of single-sex education and mixed education has occupied the minds of almost all professors of the educational process throughout the world for centuries world. To deal with this problem, there must be many sayings and arguments. Furthermore, other related studies should be considered. There are many more opinions in favor of single-sex education, others in favor of co-education. Most countries in the world follow the opinion that coeducation is better and more effective than single-sex education. Theoretically, the co-educational process is more fruitful than single-sex education, due to three main influencing factors; first, student behavior; second, the level of education; third, socialization in society and how students are affected emotionally. Supporters of homosexual education believe that students are very interested in the educational process itself, without worrying about their appearance or behavior. These types of schools help students to act freely without any motivation. A number of studies have shown that the brains of boys and girls are organized differently, so each of them requires special treatment. Furthermore, each gender has its own privacy in joking and speaking seriously. Scientists who support the theory of single sex education contribute their opinion religiously, stating that all religions require the separation of both sexes as it is prohibited and against religious teachings. They also think that mixing both genders in any place is an evil action that leads to committing sins that all religions forbid and say that there will be severe punishment on the day of judgment. While opposing opinions think that both genders should coexist to grow and learn to be...... middle of paper...... And as a result, coeducation also creates an emotionally stable and intellectually developed generation for all sexes without social pressures. Finally, no one sex school will be right for every student. There are many advantages and disadvantages mentioned in that essay before. But coeducation is thought to be preferred all over the world. Approximately 90% of schools worldwide are coeducational. Coeducation has achieved a higher success rate. They also graduate students who are emotionally stable and able to cope with real society. "There are no dominant advantages for single-sex schools academically. Studies around the world have failed to highlight any major variations." - Academic Alan Smothers, Director of Education and Employment Analytics at the University of Buckingham 2011.