CHICAGO — Chicago public schools students get their sex education in the fifth grade as most do in the U.S., but CPS wants to change that, so the instruction begins at age 5.

Parents who are uncomfortable with the new policy will be able to opt out.  CPS says the curriculum will conform to each age group. For example, kindergartners through third graders will learn about their anatomy, all living things that reproduce, and appropriate and inappropriate touching. While fourth graders will focus on puberty and HIV/AIDs. It's not until after fifth grade that teachers will lead discussions about human reproduction, contraception and abstinence.

The proposed policy follows the "national sexuality education standards" put together by four health organizations.