Should I take a math course over the summer to take IB Math SL next year?

So I’m currently a sophomore and I’m planning on doing full IB diploma next year. The problem is that I’m in math II honors and to take IB math SL, i’ll need to take math III honors over the summer. I know there is math studies SL but i heard personally from others that basically you don’t learn actual math and I want to learn math. I’m a pretty okay math student. Is it worth it to take math III over the summer?

Is Math SL a 2 year course at your school?

yes

Then I would take rhe prereq over the summer. At our school sl math is one year but it has a precalculus requirement so students can take pre-calc in 10th and SL math in 11th and be done or you take pre-calc in 11th and SL Math in 12th.