The curriculum varies by school, the state requirements are pretty vauge. My school gave the students a lot of control as long as they met the requirements, and their choices could be overruled by the guidance counselors. For example, I took Biology, Physics, AP Physics, and Chemisty in that order, while some students had other programs. There were also more relaxed versions of Physics and Biology called Life Science and Physical Science for students that didn’t have as much talent for science. There is no set standard for the order you take the classes in, but you need to have one life science and one physical science class with a lab component.