National Review's Bryon York writes a fantastic article on the controversial sex ed bill supported (but not sponsored) by Barack Obama. The bill mandated sex education be taught to children in grades Kindergarten through 6th grade.
What, specifically, was the bill designed to do? It appears to have had three major purposes:

The first, was to mandate that information presented in sex-ed classes be “factual,” “medically accurate,” and “objective.”

The second purpose was to increase the number of children receiving sex education. Illinois’ existing law required the teaching of sex education and AIDS prevention in grades six through twelve. The old law read:

Each class or course in comprehensive sex education offered in any of grades 6 through 12 shall include instruction on the prevention, transmission and spread of AIDS.

Senate Bill 99 struck out grade six, changing it to kindergarten, in addition to making a few other changes in wording. It read:

Each class or course in comprehensive sex education in any of grades K through 12 shall include instruction on the prevention of sexually transmitted infections, including the prevention, transmission and spread of HIV.

The bill’s third purpose was to remove value-laden language in the old law. For example, the old law contained passages like this:

Course material and instruction shall teach honor and respect for monogamous heterosexual marriage.
Course material and instruction shall stress that pupils should abstain from sexual intercourse until they are ready for marriage…
[Classes] shall emphasize that abstinence is the expected norm in that abstinence from sexual intercourse is the only protection that is 100 percent effective against unwanted teenage pregnancy [and] sexually transmitted diseases…

The proposed bill eliminated all those passages and replaced them with wording like this:

Course material and instruction shall include a discussion of sexual abstinence as a method to prevent unintended pregnancy and sexually transmitted infections, including HIV. Course material and instruction shall present the latest medically factual information regarding both the possible side effects and health benefits of all forms of contraception, including the success and failure rates for the prevention of pregnancy and sexually transmitted infections, including HIV…

The entire text of the bill is here. I will leave it to the reader to do some research into York's National Review's article as well as the text of the actual bill to research the merits of teaching sex-ed to children as young as kindergarten. At a minimum Obama needs to explain this very controversial vote.