<p>Looking at the curriculum guide at my old (public, not a magnet or charter) high school, they still offer a one year BC course, listing the prerequisite as a B- or higher in honors precalculus or an A in regular precalculus. They also offer an AB course with the same prerequisites, and a non-AP calculus course whose prerequisite is a C- or higher in precalculus.</p>
<p>If by “Exeter” you mean the Philips Exeter Academy, note that its calendar has three terms per academic year. So its four term calculus sequence is 1+1/3 years, not two years (the first two terms include AB, while the other two cover the rest of BC).</p>