Some states have high school starting at 9th grade while some start only in 10th. so when are the kids ready for AP classes? is this school dependent?

Yes, this usually depends on the school and/or district. The majority of students I've heard of who take AP classes start at grade 10, but there's no specific rule that sets a certain age.

I guess it all depends on how smart you are?..

The readiness of students for Advanced Placement (AP) classes can vary depending on various factors, including school policies and individual student capabilities. Typically, AP classes are designed for academically advanced high school students who want to challenge themselves with college-level coursework.

In states where high school starts at 9th grade, students may have the opportunity to take AP classes starting in their sophomore year (10th grade) or later, depending on school policies. It is important to note that readiness for AP classes is not determined solely by grade level but by a student's academic preparedness, ability to handle the rigor of college-level coursework, and interest in the subject matter.

To determine if a student is ready for AP classes, schools may consider various factors such as grades, performance in prerequisite courses, standardized test scores, recommendations from teachers, and motivation. Some schools may require students to meet certain criteria or prerequisites before enrolling in AP courses.

If you are a student or a parent and you are wondering about your eligibility for AP classes, the best approach is to contact your high school guidance counselor or academic advisor. They can provide specific information about your school's policies, expectations, and criteria for enrolling in AP classes.

It's worth mentioning that while AP classes can be challenging, they can also offer various benefits such as earning college credit, demonstrating academic strengths to college admissions officers, and preparing for the rigor of college-level studies. However, it is essential to find the right balance between academic challenge and personal well-being, as each student's needs and abilities vary.