Complex sentence: Often, students take some of the requisite high-school courses in the Academy before enrollment in the High School; as a result, many Academy students can take many more AP courses at the end of their high-school study.
Split into simpler sentences: Often, students take some of the requisite high-school courses in the Academy before enrollment in the High School. As a result, many Academy students can take many more AP courses at the end of their high-school study.