Year 12s: what will be the first way you research your future options? >>

What are the best choices to make if I want to become a maths teacher

I know that I want to be a maths teacher, but I'm not sure as to what I should take for GCSEs to pursue that goal, as well as what college/university would be best choice.the GCSE options I'm choosing so far are:Art: Because I find it enjoyable and can have it as a backup job if the teaching one doesn't succeedBusiness: because I feel as if understanding the world of business will give me more opportunities in the futureHistory: because I am required to pick a humanities or languages, and I can't speak French.IT:Because it is quite maths-based in my school.I'll focus on mathematics, but I'm still unsure of these choices that I've made, and if they could benefit me in my future.- A really confused, unsure, and scared human