OP - You really need to ask the upperclassmen at your school about the AP teachers. That’s the only way to know which classes may be harder/easier at your high school. At our school, the AP World History teacher was very demanding, and the class was a lot of work (but his students always did well on the AP exam). AP Environmental Science is usually considered an easy class, but at our school it was not due to a very good and enthusiastic teacher.