Don't be afraid to read things you think you may disagree with. Aristotle once said, "It is the mark of an educated mind to be able to entertain a thought without accepting it." Grow an educated mind.
To help us accomplish this, I've set up a Google Classroom that is private to us. There you can post things you've read. Articles, book summaries, poems, whatever. Seek out material that stretches you. Read material educated adults read such as the Atlantic, Harpers, the Washington Post, the New York Times, etc. Read what others post. Comment on the ideas in those articles. Discuss them with each other. Become students of the world.
There is a link in the upper right to Classroom. You have all been invited to join (see your school email or just go to classroom.google.com, log in using your school Google account, and accept the invitation). You all have posting and commenting permissions. There are Google Classroom apps available in both the Play and App stores and Classroom is available online as well.