Dic: from the old school (also, of the old school)

• Grammar is not taught much now, but fortunately my son has a teacher from the old school.
• Aunt Jane is from the old school. She never goes out without wearing a hat and gloves.

Fig. holding attitudes or ideas that were popular and important in the past, but which are no longer considered relevant or in line with modern trends. (See also of the old school)

.... http://idioms.thefreedictionary.com/school