A lot of us really want to be able to say something when we see or hear someone behaving inappropriately, there are some skills we can learn to make this a little easier.
Hearing someone making inappropriate and sexist comments can be quite confronting. It is great that you are exploring ways that you can be an active bystander to support those around you. Have a look at our Bystander Toolkit for a range of bystander interventions you can use https://rizeabove.org.au/tip-zone/bystander-toolkit/ . You can choose a response that best suites the situation and your relationship with the person making the comments.
No matter what the response, a response is important. If we don’t do something to show that the comments or behaviors are problematic, they will continue as no one has highlighted an issue with it.
Most importantly consider your safety. If it is unsafe for you to respond directly, there are a number of indirect ways. For example, you can support the person the comments and behaviors were directed at or you can tell a trusted adult at school about what is happening so they can intervene.