Welcome. One of my 3 teaching credentials is in Math--I taught publicly for 30 years. I am frequently amazed at how bad the high school math teachers are, even in the best schools Southern California (Mater Dei, HBHS). I wrote about it on my Steemit blog ezrabcs.
One question for you--are you going to take any Philisophy classes at Oxford, esp. Plato? Just wondering. . .
I took upper division Philosophy courses at UCI and have been into Platonic thought since the mid 70's.