@Jayku – I notice that you have asked a few times when IB students can start AP courses. I am not sure, but you may be combining the two programs, which are separate. IB (International Baccalaureate – http://www.ibo.org/) is a separate program from AP (Advanced Placement – https://apstudent.collegeboard.org/home).
Both AP and IB allow students to take courses in HS to prepare them for exams that (if they earn a certain score) will grant them college credit (assuming the school where the child matriculates will accept the credit).
While students may be able to take some IB courses on a class by class basis, the approach is more holistic, and students who follow the full IB curriculum can be eligible for an IB diploma. AP courses are on more of a class by class basis.
IB has a program for “middle years” – which they define as 11 - 16, but the IB diploma program is for ages 16 - 19, which is the US is generally junior/ senior year.
As others have mentioned, many schools will not generally allow 9th graders to take most APs. I agree with others, make an appointment with her middle school guidance counselor to get a sense of the courses that are available to her as a 9th grader. You may also want to ask about Dual Enrollment (where HS students take courses in their HS for college credit, or attend a local college to take college classes which count towards HS graduation).