Town life - private school

Boardings schools were introduced with the expansion "The Sims 3: Generations". To get the option to send your kids to a boarding school you should get that expansion. You can enroll your kids in a boardings school from the computer or phone. Once a Sim is enrolled in a boarding school, a car will come to pick them up.

"Town Life" is a stuff pack that gives you additional venues, furniture, and outfits. You can get an overview what the stuff pack gives you here:

http://www.ea.com/sims-3-town-life-stuff