Here are some possible topics for your paragraph:
1.Should students have to wear uniforms?
2.Should females have to do military service or some alternative?
3.College entrance exams
4.Money
5.Sports
6.International marriages
7.Should elementary school students have cell phones?
8.Should colleges / universities be free to attend?
9.Should students have to learn a foreign language (English, Chinese, etc.)
10. Do SNS sites lead to more isolation or to connections?
11. Is society too dependent on technology?
12. Does the school day start too early?