RIYADH — More than four and a half million male and female students in public schools across Saudi Arabia will return to their classrooms for the start of the new academic year on Sunday, Aug. 23. Teachers of schools under the educational departments of Makkah, Madinah, Jeddah, and Taif will return to their duties on Sunday. However, students in these schools will resume their studies a week later on Aug. 30. The Ministry of Education has instru…