This is my first year teaching in an introductory biology course in my home country, Ecuador. Most of the students are in their first year. A challenge that I have faced so far is the use of inclusive language when I teach sex determination in humans. The way this is explained in textbooks and the way I learned this is that females have XX chromosomes and males have XY chromosomes. However, this approach does not touch on the differences between gender and sex. I don’t know if any of my students are transgender, but I still think it would be important for cisgender people to be more aware of this. In this sense, I think the way I taught this material originally was exclusionary and may have helped reinforce transphobic ideas (Dennis 2017, https://www.youtube.com/watch?v=eWVRzGMVXbM). I also don’t feel fluent enough in this subject and am a bit intimidated to discuss it in a classromm. I think a good place to start is looking for trans people’s thoughts on this. For example, one teacher suggested mentioning a lot of different ways in which sex is determined in nature (Maday-Travis n.d., https://www.glsen.org/blog/6-ways-i-make-my-science-class-lgbtq-inclusive-trans-teacher). I think the major challenge is that Spanish is a gendered language, so that every noun has a gender. I am not sure if this means that the fact that a chair is a “she” and a couch is a “he” means that these objects carry “female/male” characteristics. But it does make it harder to speak in an inclusive way about XY and XX individuals. Alternatively, it might be that this subject is a good way of starting a conversation. I think this would be useful for all of us who are not fluent in sex-gender theories. However, it might also turn into a space where people say things that might be hurtful. I would greatly appreciate any input on this!