A quick explanation for my thread - I've been a physics teacher for 10 years, but I've always wanted to learn more about stars and space. So I took two years off to study for an MSc. in Astrophysics. I'm writing my thesis on something pretty non-standard for astro nerds: I'm trying to write a new syllabus for a high school level astrophysics course. I would very much like to hear your opinions on what you think would be important topics to include in a high school astrophysics class. Astronomers, physicists, high school students, anyone who is interested in astronomy can be a help! I've already got plenty of ideas about topics that I think could be useful, but I think it could be much better to also include your opinions. The syllabus I'm working on may actually be used by the International Baccalaureate Organisation (IB), which is a worldwide course of study for high school students. Astrophysics is an optional topic within the IB Physics course right now, and I'm collaborating with the IB to develop a new Astrophysics syllabus for them. So, your ideas could end up affecting hundreds of thousands of students worldwide! Some topics should be included because they are key facts, some topics should be included because they capture students' imaginations, while other topics could be included because they show that science is a changing field - there are lots of questions that we still don't know the answers to!