Speaking of teaching math, IB or otherwise, I have a suggestion. Let's stop trying to sell math -- and all the other subjects -- as content kids will need for employment. Most kids are smart enough to know that is bunk anyway.
For example, I worked as a computer programmer from post-college to willful unemployment. Did I use math concepts in my work? Yes! But not typically the ones we push in high school math classes.
What I as a programmer primarily gained from math was a style of thinking and some techniques for conceptualization. Some of the people I worked with had similar math-based skills but others did not. Besides, the job of "computer programmer" is already essentially passe; the title is still in use but the people they hire are mostly either users of packaged software or low-grade hackers.
This does not mean we should not teach math. It means we should teach math and German and history and Shakespeare for the real benefits these subjects offer to students. For example, reading, writing, painting, and thinking contribute objectively to the "health span" of adults according to an article in The Guardian:
"People with the highest lifetime enrichment developed Alzheimer's disease at an average age of 94, compared with 88 for those with the lowest level of enrichment -- more than a five-year delay."
https://www.theguardian.com/society/2026/feb/11/reading-writing-lower-dementia-risk-study-finds
Maybe you could round up some grants for teaching Chinese language or for playing shawms on the grounds these topics too have direct benefits for students' future lives.