My first sex Ed class was in 5th grade and my middle school health classes introduced more in depth on the health side of it. In high school, while entirely hetero focused, went more in depth into anatomy. Sure, the earlier classes could have been more informative (we were coming into the age of puberty, and there was not enough focus on the coming changes and arguably too much focus on the fact that periods exist, tampons are scary, etc since we were divided by sex for the early classs) but it was definitely talked about.

This would be 2005-2012.