Are there gender differences between men and women or are we just talking about sterotypes? Are there biological differences between men's and women's brains or are the differences social and cultural? Many English coursebooks for adults use this topic to raise debate in the classroom: Gender or individual differences? Nature or nurture?
Here you can find a selection of materials to teach a lesson about gender issues, which I have used to expand the reading "How Men and Women Argue" on p. 64 of Christina Latham-Koenig's & Clive Oxenden's, English File Upper-Intermediate, 3rd Edition, Oxford University Press:
"Men & Women", a set of controversial statements which students can discuss, first in pairs and then, as a class.
Some links to TED Talks videos that could be given for listening/oral homework (students are assigned one video, they watch it at home, take notes and in the first 15 minutes of the next class they share the information in pairs):
1) John Gray, the author of the book "Men are from Mars and Women are from Venus" at TEDxBend
2) Daphna Joel at TEDxJaffa: Are Brains Male or Female?
3) Paul Zak, at TEDxAmsterdamWomen: The Differences Between Men and Women. This video contains more technical words, so it is more suitable for C1 or C2 students:
4) Finally, Mark Gungor, a male comedian, uses men's and women's stereotypes to make a wide audience laugh about the misunderstandings that frequently occur between men and women: