I agree with the previous poster that you must visit the school to make the best decision. See if they have an event like a Curriculum Fair or Science Fair so you can even talk to parents and students.
The biggest drawback is definitely the cost, and included in that is the fundraising. At our school, on top of tuition we also are required to raise $400 per child (maximum $800 per family). This means if we don't raise it we pay it ourselves. Some people choose not to sell the calendars and candy bars and just write a check for the $400.
The pros of Catholic school are small class sizes, high academic standards and a faith based curriculum -- including daily prayer, Mass once a month, preparation for the sacraments.
Ask about their discipline policy, their rate of acceptance to Catholic high schools, their standardized testing scores, as well as whatever other concerns you might have.
at 8:18 AM on Mar. 27, 2009