<p>Jumping in here really quick:
I’d advise him to take math for the fourth year. I’ve known many kids that struggle with Algebra but love geometry that do very well in trig.
Is also advise him NOT to take physics. It would almost be like a second math class. Chemistry would be a better option. </p>
<p>Like math or not, I think it could potentially harm either his college admissions chances or make it more difficult when he has to take a math class in college. </p>
<p>Nothing wrong with choosing a major that has less of what you don’t like and more of what you do! Just keep your options open.</p>