By failing your courses and or dropping out. High Schools in the US don't have a static curriculum. Not all students graduating will have taken Algebra 2, Pre-Calc, trig. They also may not have taken Physics or a lot of the other sciences.
Most public High Schools in the US are honestly extremely hard to fail out of. As long as you get C's in all your classes you'll graduate.
Most public High Schools in the US are honestly extremely hard to fail out of. As long as you get C's in all your classes you'll graduate.