Some great points have been made and I hope you have a good outcome 5ITB.
I, too, think it's odd that it is assumed children of atheists don't learn about religion.
The main point is the difference between learning one religion as fact and learning about many religions from a cultural and historical perspective.
Growing up, I was taught about the beliefs of many, many different religions and I was exposed to varying religious practices. I knew more about religion and the diverse beliefs which exist than any of my peers at high school who came from Christian households - excluding one friend, who was also an atheist.