What types of jackets would suit my style and needs?

I’m a teacher in the US PNW, so things are chill. My typical attire is some hybrid joggers (black, khaki, navy) with white sneakers and a golf polo or a plain tee. Some of the polos are bold, some are chiller. So, golf aesthetic. I typically prefer something with an open front for easy removal when my class gets warm. What would be a good outer layer to wear with this?