Complex sentence: Schools say this is necessary in order to encourage continues enrolment of girls, however, some parents of boys call this discriminatory, and say that girls no longer face discrimination in educated families so differing treatment by schools in unwarranted.
Split into simpler sentences: Schools say this is necessary in order to encourage continues enrolment of girls. However, some parents of boys call this discriminatory, and say that girls no longer face discrimination in educated families so differing treatment by schools in unwarranted.