Christian education should be high-quality education. The Bible would be one of their textbooks. While checking out the schools, you should visit the classrooms to know about the quality of education. You should look what is on the walls, because the walls speak even when nobody there for that day. Look for the walls and bulletin boards of the classrooms, do they drip with student works, the Bible verse, or with teacher-produced materials? Do you see evidence that this school is a Christian school? Do you feel the evidence that students are being called to joyful obedience to Jesus Christ?