TORONTO -- Ontario's Liberal government has released a new ad promoting an updated sex-education curriculum that will be in schools when classes resume next week.

The new curriculum has met with some opposition and controversy and has prompted protests by some parents, with some even threatening to pull their kids out of school this year.

The new ad shows young people in a variety of situations: a boy looking at a figure of two grooms atop a wedding cake, a girl examining herself in a full-length mirror, a boy using social media, a girl starting to lift up her shirt and appearing to take a selfie, and a boy leading a nervous-looking girl inside at a house party.

It then shows the kids and teens in those scenarios raise their hands, as a narrator says, "Our kids have questions. The sex-ed and health curriculum can help."

The ad stresses that this is the first update to the curriculum since 1998.

Some parents have raised concerns that some of the material is not age appropriate, with many parents pointing to sections on same-sex relationships, gender identity and masturbation.