<p>In my school district, only students getting good grades in 7th grade Math can take Algebra I in 8th grade. Of course, only those do well in Algebra I (I think getting A or B) can move up to geometry or geometry AC in 9th grade. Some student would take a summer course before high school and test out geometry, but still, most applied got denied. So it is a rather rare case to reach Calculus in junior or earlier. At least half of the class would not reach Calculus level at all in high school.</p>