looking for an anime recommendation

Many of my fine friendslist gave me excellent leads on good anime in the past. I now have a very specific question, and hope some of you will be able to point me in the right direction. My friend is looking for some anime to show 11th & 12th grade students in a school environment. (So about 16-18 years old, no tentacle rape) She is especially looking for stories that have strong female characters, and stories of individualism versus conformity.

My first thoughts were Serial Experiments Lain and Death Note. I think both of those have solid, fascinating stories that present large ethical/moral issues. Lain is probably one of my favorite female anime characters ever. Any others I should add to the list?